Conflict & Security in the 13th century

583 sourced entries, 1200 CE to 1299 CE, oldest first. Also see Conflict & Security across every century or everything else in the 13th century.

• 1200Temüjin (or Genghis Khan) manages to unite about half the feuding Mongol clans under his leadership. He delegates authority based on skill and loyalty, rather than tribal affiliation or family. The main rivals of the Mongol confederation are the Naimans to the west, the Merkits to the north, the Tanguts to the south and the Jin Dynasty (or Great Jin) to the east.source
• 1201Battle of Stellau: Count Adolf III of Holstein is defeated by the Danish army under King Canute VI. Adolf retreats with his forces to Hamburg, where he is besieged and later captured by Duke Valdemar of Schleswig.source
• 1202April–May – The bulk of the Crusader army gathers at Venice, although with far smaller numbers than expected: about 12,000 men (4–5,000 knights and 8,000 soldiers) instead of 33,500 men. Several contingents decide to make their own way to the Holy Land by different routes. A Crusader fleet, sailing from Flanders, carrying supplies for the Counts Baldwin IX and his brother Henry of Flanders, winters in Marseille, but is slowed by adverse weather. Later it sails on to the Middle East, along with other contingents from southern France.source
• 1202July 27 – Battle of Basian: Seljuk forces (some 150,000 men) under Suleiman II of Rûm advance toward the Georgian border and are met by a 65,000-strong army led by King David Soslan, husband of Queen Tamar I of Georgia, at Basian. The Georgians assail the enemy's camp and in a pitched battle, the Seljuk forces are overwhelmed and defeated. The loss of the sultan's banner (while Suleiman himself is wounded), results in panic within the Seljuk ranks. The victory at Basian secures the Georgian preeminence in the region.source
• 1202August 1 – Battle of Mirebeau: Arthur of Brittany, supported by the Lusignans, lays siege to Mirebeau Castle trapping Eleanor of Aquitaine inside. John launches a rescue mission to free his mother, and with a mercenary army defeats the Breton-Lusignan forces. Arthur is captured by William de Braose and is handed over to John who imprisons him in the Château de Falaise in Normandy. Many other important knights are captured and shipped to England (where John treats them badly and keeps them as prisoners in dungeons).source
• 1202November 10–24 – Siege of Zara: The Crusaders under Boniface of Montferrat besiege and conquer Zara (modern-day Zadar) in Dalmatia. Despite letters from Innocent III forbidding such an action, and threatening excommunication. The leading citizens of Zara hang banners of crosses along the outer walls, professing their Catholic faith. Nevertheless, the Crusaders breach and sack the city, killing many.source
• 1202Spring – King Philip II of France ("Augustus") summons John, King of England ("Lackland") to Paris to answer his charges against the Lusignans. On April 28, failing to attend Philip's court, John is declared to be a 'rebel' and to have forfeited the areas of Aquitaine, Poitou and Anjou. Philip tries to mediate the political problems between John and the Lusignans (who are charged with treason) but this is ignored by John. The lands are given to Arthur of Brittany. Philip supports Arthur's claim to the English throne and betrothes his 4-year-old daughter Marie.source
• 1203June 23 – The Crusader fleet comes within sight of Constantinople, and enters the Bosporus. The Byzantine capital is defended by a garrison of 15,000 soldiers (including 5,000 men of the Varangian Guard), and a fleet of 20 galleys. On June 26, the Byzantine troops skirmish with the Crusader forces, who attack, without success, the cities of Chalcedon and Chrysopolis.source
• 1203July 2 – Crusader leaders sail close to the city's walls in order to display the young Alexios Angelos, where they call upon the Byzantines to rise up in his favour. After rowing back and forth for a while, receiving insults and missiles, the attempt is abandoned. The Crusader leadership decides to land an invasion force north of Galata – using prevailing currents and winds.source
• 1203July 5 – The Crusader fleet disembarks their horse transports, and barrels down upon the Byzantine defenders in a full cavalry charge. The Byzantines flee after brief combat, and retreat to the Tower of Galata, where they fortify themselves. After a bitter struggle, the Crusaders capture the tower and break the floating chain, and allow their fleet to enter the Golden Horn.source
• 1203July 11 – The Crusaders take positions opposite the Palace of Blachernae on the northwest corner of the city. Their first attempts are repulsed, but on July 17 the Venetians take a section of the wall of about 25 towers, while the Varangian Guard holds off the Crusaders on the land wall, inflicting heavy casualties. The Venetians set fire to the buildings inside the Golden Horn walls, and then abandon the occupied fortifications.source
• 1203July 17–18 – Alexios III tries to counterattack from the Gate of St. Romanus but retreats without a fight. Embarrassed, he prefers to escape and abandon his subjects, fleeing with the imperial treasure to Develtos (a fortified town on the Gulf of Burgas) in Thrace. Meanwhile, the Byzantine aristocracy restores the ex-emperor Isaac II to the imperial throne. On August 1, Alexios Angelos is crowned co-emperor as Alexios IV.source
• 1203August 31 – The Venetians rally a rabble of soldiers and storm through the walls, attacking the Mitation Mosque which results in extensive fires in Constantinople. Finally, they are fought off by the Byzantines and Muslims standing side by side. It becomes one of the most extensive urban conflagrations in European History and renders some 100,000 people homeless.source
• 1203August – Alexios IV announces new taxes and enrages the Orthodox Church by confiscating large quantities of Byzantine icons, many centuries old, and melts them down to produce enough silver to pay the massive debt to the Venetians. A riot breaks out in Constantinople – during which the Byzantine populace loots and burns the homes of Italian residents in the city.source
• 1203August – Siege of Château Gaillard: French forces under Philip II begin the siege at Château Gaillard as part of a campaign to reconquer the continental properties of King John of England. During the winter of 1203/1204, the English under William Marshal attempt to relieve the castle.source
• 1203October – Brothers' Quarrel: Emeric, King of Hungary captures his rebellious brother Duke Andrew without resistance following their third confrontation in recent years.source
• 1203December 6 – King John abandons the lands that have been held by the Dukes of Normandy for over a hundred years and returns to England. Only two castles hold out against the French forces – they are Chinon Castle, controlled by Hubert de Burgh and Loches Castle.source
• 1203Siege of Constantinople: The Crusaders, led by Boniface of Montferrat, capture Constantinople, in support of the deposed Emperor Isaac II and his son Alexios Angelos. This marks the main outcome of the Fourth Crusade.source
• 1203Late – In a 3-day battle at the Jeje'er Heights on the lower Kherlen River, Temüjin defeats the Kereit and Toghrul is killed.source
• 1203Spring – King Philip II of France invades Normandy and attacks a number of castles in the surrounding region. In April, John, King of England loses the support of his French vassals who desert him. Philip enters Rouen, leading to the eventual Treaty of Paris (1259) and unification of Normandy and France.source
• 1203Early – Battle of Khalakhaljid Sands: Temüjin, khan of the Mongol tribe and the future Genghis Khan, is comprehensively defeated by the forces of Toghrul, khan of the Kereit.source
• 1203Minamoto no Sanetomo becomes the third shogun of the Kamakura Shogunate. During his reign, Sanetomo is a puppet ruler for his mother Hōjō Masako who uses him as a pawn in her war with her father Hōjō Tokimasa.source
• 1204January 27–28 – Byzantine emperor Alexios IV Angelos is overthrown in a revolution.source
• 1204April 12 – Sack of Constantinople: Crusaders enter Constantinople by storm and start pillaging the city as part of the Fourth Crusade. Forces of the Republic of Venice seize the antique statues that will become the horses of Saint Mark.source
• 1204Angers and Normandy are captured by Philip II of France.source
• 1204Hermann I, Landgrave of Thuringia submits to Philip of Swabia.source
• 1205March 19 – Battle of Adramyttion: The Byzantine army, under Constantine Laskaris (brother of Theodore I), appears before the walls of Adramyttium – surprising the Latin garrison. Meanwhile, Henry of Flanders, not wanting to remain trapped within the city, opens the gates and charges out with his heavy cavalry. He and his knights defeat the Byzantine forces, who are scattered and forced to retreat.source
• 1205March – Byzantine officials in Adrianople revolt and expel Latin administrators, requesting Bulgarian support from Kaloyan, ruler (tsar) of the Bulgarian Empire, against Baldwin I who assembles an army (some 40,000 men) and marches to aid the Byzantines. Meanwhile, Baldwin sets out from Constantinople in force, he arrives at Adrianople and promptly begins to siege the city by the end of March.source
• 1205April 14 – Battle of Adrianople: Latin forces under Baldwin I are defeated and eliminated in a successful ambush by Bulgarians, Vlachs and Cumans. Baldwin is captured and taken as prisoner to Veliko Tarnovo – where he is locked up at the top of a tower in the Tsarevets fortress. Later, Baldwin is possibly executed by orders of Kaloyan (this according to the Byzantine historian George Akropolites).source
• 1205June 19 – Battle of Zawichost: Polish forces under High Duke Leszek the White defeat the Kievan army at Zawichost. During the ambush, Roman Mstislavich, Grand Prince of Kiev, is killed. He is succeeded by his two infant sons, Daniel and Vasilko. Their principalities are ruled by their mother Anna of Byzantium, but the boyars of Galicia–Volhynia forces her and the young princes into exile.source
• 1205Summer – Battle of Koundouros: Byzantine forces (some 5,000 men) under Michael Doukas, governor of the Theme of the Peloponnese (and later Despot of Epirus), tries to stop the Latin army (some 700 knights and foot soldiers) at the Olive Grove of Koundouros. The Byzantines are defeated by William of Champlitte, who later founds the Principality of Achaea (a vassal state of the Latin Empire).source
• 1205Summer – King Philip II ("Augustus") conquers most of the Angevin lands, including much of Aquitaine. Fearing a French invasion of England itself, John, King of England ("Lackland") requires every English male over 12 years to enter a mobilization "for the general defense of the realm and the preservation of peace". John prepares an expedition force of his own, but the barons refuse to cross the Channel.source
• 1205Spring – Theodore I Laskaris is proclaimed Byzantine emperor (or basileus), formally founding the Empire of Nicaea, after repelling the invasions of rivals David Komnenos and Manuel Maurozomes into his domains. His appointment is an open challenge to the legitimacy of the Latin emperor Baldwin I, who rules over large parts of the former Byzantine Empire and regards Theodore as a usurper.source
• 1206January 31 – Battle of Rusion: The Bulgarian forces (some 7,000 men), under Tsar Kaloyan, defeat the remnants of the Latin army, near the fortress of Rusion in Thrace. Around 120 knights, supported by soldiers and cavalry, are killed in battle or captured.source
• 1206February – The Bulgarians attack and loot the fortified town of Rodosto (see Battle of Rodosto), defended by a Venetian garrison. Later, Kaloyan captures many more towns and fortresses.source
• 1206June – John, King of England ("Lackland") lands an expeditionary army at La Rochelle to defend his interests in Aquitaine, which is his from the inheritance from his mother, Queen Eleanor of Aquitaine. Meanwhile, French forces led by King Philip II ("Augustus") move south to meet John. The year's campaign ends in a stalemate and a two-year truce is made between the two rulers.source
• 1206Muqali (or Mukhali), a Mongol general in service of Genghis Khan, is rewarded with the command of the left-wing of the newly reorganized Mongol army and takes control over the eastern Mingghans.source
• 1206The Livonian Brothers of the Sword, in alliance with the Semigallians, conquer the Livonians (or Livs).source
• 1207Prince Mstislav Mstislavich ("the Daring") clashes with his uncle Rurik Rostislavich, Grand Prince of Kiev, and is forced to surrender the town of Torchesk (a major centre of resistance against Polovtsian raids).source
• 1207In Vietnam, the Lý dynasty witnessed the political crisis under king Lý Cao Tông. The barbarians in Tản Viên mountain rebelled against the emperor. They continued to rule Tản Viên mountain independently until the beginning of the Trần dynasty. In March, two chieftains Đoàn Thượng, Đoàn Chủ in Hồng Châu (present day Hải Dương and Hải Phòng) rebelled and declared themselves kings. Their rebellions lasted for 2 years, contributing to the fall of the Ly dynasty.source
• 1207Spring – Siege of Attalia: Seljuk forces led by Sultan Kaykhusraw I besiege the city port of Attalia (modern-day Antalya) with siege machines. After a siege of more than 2 months, the city is captured, Kaykhusraw allows his forces 3 days of looting and slaughtering. The capture of the port gives the Seljuk Turks a major path into the Mediterranean.source
• 1207Jochi, eldest son of Genghis Khan, subjugates people of the Siberian forest (taiga); the Uriankhai, the Oirats, the Barga, the Khakas, the Buryats, and the Tuvans, extending the northern border of the Mongol Empire.source
• 1208January 31 – Battle of Lena: Swedish forces under Erik Knutsson defeat the invading Danish army (some 12,000 men). King Sverker the Younger is deposed as king of Sweden and is succeeded by Erik.source
• 1208June 21 – Philip of Swabia, king of Germany, is assassinated in Bamberg by the German count Otto of Wittelsbach, because Philip has refused to give him his 10-year-old daughter Beatrice in marriage.source
• 1208June 30 – Battle of Philippopolis: Bulgarian forces under Emperor (tsar) Boril are defeated by the Latin army (some 30,000 men) led by Emperor Henry of Flanders, near modern-day Plovdiv, Bulgaria.source
• 1208November 17 – Innocent III asks the nobles in Northern France to take military action (the so-called Albigensian Crusade) against the Cathars in Languedoc.source
• 1208Autumn – William Marshal is recalled and humiliated by King John at court in London, while John gives his justiciar in Ireland, Meiler Fitzhenry the order to invade Marshal's lands there, burning the town of New Ross.source
• 1209May – The First Parliament of Ravennika, convened by Emperor Henry of Flanders, is held in the town of Ravennika in Greece, in an attempt to resolve the rebellion of the Lombard nobles of the Kingdom of Thessalonica. Henry pardons Lord Amédée Pofey (or Buffois), and reinvests with his fief, while the other nobles persist in their rebellion and keep to their castles. After receiving imperial recognition, Geoffrey I of Villehardouin becomes Henry's vassal, thereby subordinating Achaea directly to Constantinople.source
• 1209July 22 – Massacre at Béziers: The Crusader army, led by Simon de Monfort, arrives in the Languedoc area, and makes camp at Béziers, to start a siege. The citizens, believing that their city walls are impregnable, harass the Crusaders, by sending a group of soldiers (supported by armed civilians) to launch a sortie against their camp. When they are forced to retreat, the Crusaders storm the walls (which are not properly manned) and enter the gate, sacking and killing some 20,000 Cathars and Catholics alike.source
• 1209Black Monday, Dublin: A group of 500 recently arrived settlers from Bristol are massacred by warriors of the Irish O'Byrne clan. The group (accompanied by women and children) leaves the safety of the walled city of Dublin to celebrate Easter Monday near a wood at Ranelagh, and are attacked without warning. Although a relatively obscure event in history, it is commemorated by a mustering of the Mayor, Sheriffs, and soldiers on the day, as a challenge to the native tribes for centuries afterwards.source
• 1209Spring – The Mongols led by Genghis Khan begin their first invasion against the Western Xia state (or Xi Xia). They push up along the Yellow River, capturing several garrisons and defeating an imperial army. The Mongols besiege the capital Zhongxing – which holds a well-fortified garrison of some 70,000 men (hastily reinforced with another 50,000). Genghis lacks the proper equipment and experience to take the city. In October, an attempt to flood the city by diverting the Yellow River is disastrous and floods the Mongol camp, forcing the Mongols to withdraw.source
• 1209Tamar I, queen of Georgia, raids Eastern Anatolia and seizes Kars. She leads a liberational war in southern Armenia.source
• 1210July 18 – Battle of Gestilren: Sverker the Younger, the exiled former King of Sweden, is defeated and killed by the reigning King Erik Knutsson. After the battle, Erik takes the Swedish throne and marries Princess Rikissa of Denmark, daughter of the late King Valdemar I of Denmark to improve the relations with Denmark, which had supported King Sverker.source
• 1210November 18 – Emperor Otto IV is excommunicated by Pope Innocent III after he occupies Apulia in southern Italy. Otto annuls the Concordat of Worms and demands from Innocent recognition of the imperial crown's right. A German civil war breaks out, and Otto prepares an invasion against Frederick II, king of Sicily.source
• 1210November 22 – Siege of Termes: The Castle of Termes falls to Simon de Montfort during the Albigensian Crusade.source
• 1210Battle of Ümera: Estonian forces defeat the Crusaders of the Livonian Brothers of the Sword. The Estonians pursue the fleeing Crusaders and according to the Livonian Chronicle some of the prisoners are burned alive, while others have crosses carved on their backs with swords before being executed as well.source
• 1210Jochi, Mongol leader and eldest son of Genghis Khan, begins a campaign against the Kyrgyz. Meanwhile, Emperor Xiang Zong of Western Xia agrees to submit to Mongol rule, he gives his daughter, Chaka, in marriage to Genghis and pays him a tribute of camels, falcons, and textiles.source
• 1211June – Shams ud-Din Iltutmish, son-in-law of the former Sultan Qutb al-Din Aibak, becomes ruler of the Delhi Sultanate and quells the Hindu rebellions in India.source
• 1211October 15 – Battle of the Rhyndacus: Latin emperor Henry of Flanders lands with an expeditionary force (some 3,000 men) at Pegai, and marches eastwards to the Rhyndacus River. The Byzantine army (much larger in force overall) under Theodore I prepare an ambush, but Henry assaults his positions along the river and defeats the Byzantine army in a day-long battle. Henry marches unopposed through the remaining Byzantine lands, reaching south as far as Nymphaion.source
• 1211Spring – Albigensian Crusade: Crusader forces led by Simon de Montfort conquer Toulouse and besiege Lavaur in southern France. On May 3, the city is retaken; on orders of Montfort the senior knights are hanged and some 400 Cathars are burned alive.source
• 1211Summer – John, King of England ("Lackland") campaigns in Wales against Llywelyn the Great, prince of Gwynedd. In July, after the Welsh uprising, John and Llywelyn reach an agreement and a peace treaty is signed.source
• 1211Livonian Crusade: Battles of Viljandi and Turaida – The Crusaders fail to conquer the Viljandi stronghold, but manage to baptize Sakala and Ugandi counties (Southern Estonia).source
• 1212July 16 – Battle of Las Navas de Tolosa: The Christian forces of King Alfonso VIII of Castile ("the Noble") decisively defeat the Almohad army (some 30,000 men) led by Caliph Muhammad al-Nasir. The victory gives a further impulse to the Reconquista but this leaves the Kingdom of Castile in a difficult financial position, as numerous soldiers have to be paid by the treasury.source
• 1212Spring – After the fall of Argos the Crusaders complete their conquest of the Morea in southern Greece. The city, along with Nauplia, is given to Othon de la Roche, a Burgundian nobleman, as a fief, along with an income of 400 hyperpyron from Corinth. Meanwhile, the Venetians conquer Crete and evict Henry, Count of Malta ("Enrico Pescatore"), a Genoese adventurer and pirate, active in the Mediterranean.source
• 1212Autumn – Genghis Khan invades Jin territory and besieges Datong. During the assault, he is wounded by an arrow in his knee and orders a withdrawal for rest and relaxation.source
• 1213May 30 – Battle of Damme: The English fleet under William Longespée, 3rd Earl of Salisbury, destroys a French fleet off the Belgian port in the first major victory for the fledgling Royal Navy.source
• 1213September 12 – Battle of Muret: The Toulousain and Aragonese forces of Raymond VI of Toulouse and Peter II of Aragon are defeated by the Albigensian Crusade, under Simon de Montfort.source
• 1213Jin China is overrun by the Mongols under Genghis Khan, who plunder the countryside and cities, until only Beijing remains free, despite two bloody palace coups and a lengthy siege.source
• 1214June – Otto IV arrives in Flanders with a small army; four German nobles have joined him, but he is soon reinforced by troops of Renaud I, duke of Boulogne, Ferdinand, (jure uxoris) count of Flanders and the mercenaries under William Longespée. On July 26, Philip II arrives at the Flemish town of Tournai with his army (some 7,000 men), while the allied forces encamp 12 kilometers south at the Castle of Mortagne (France).source
• 1214July 27 – Battle of Bouvines: Philip II defeats an army (some 9,000 men) of German, English and Flemish soldiers led by Otto IV near Bouvines, ending the Anglo-French War. The French forces have taken a considerable number of soldiers prisoner, including 131 knights and five counts with Ferdinand, Renaud I and William Longespée among them.source
• 1214November 1 – Siege of Sinope: The Seljuk Turks under Sultan Kaykaus I capture the strategic Black Sea port city of Sinope – at the time held by the Empire of Trebizond (one of the Byzantine successor states formed after the Fourth Crusade). Emperor Alexios I of Trebizond leads an army to break the siege, but he is defeated and captured. His capture forces the Byzantines to accept tributary status to Kaykaus.source
• 1214In his campaigns in Liaodong, the Mongol general Muqali (or Mukhali) forms a newly Khitan-Chinese army and a special corps of some 12,000 Chinese auxiliary troops.source
• 1214Spring – Emperor Xuan Zong of the Jurchen-led Chinese Jin dynasty surrenders to the Mongols under Genghis khan – who have besieged the capital of Zhongdu (modern-day Beijing) for a year. He is forced to pay tribute (including some 3,000 horses, 10,000 'bolts' of silk and his daughter), along with subjugation to the Mongol Khan. Xuan Zong abandons northern China and moves his court to Kaifeng.source
• 1214After securing all Jin lands north of the Yellow River, Genghis Khan receives a message that Xuan Zong has moved his capital to Kaifeng. He returns to Zhongdu and precedes the city with the help of thousands of Chinese engineers. The Mongols starve the city out (the inhabitants are forced to eat the dead). The garrison, with a short supply of ammunition for the cannons holds out for the winter.source
• 1215May 5 – Robert Fitzwalter is elected by the Barons as their general, with the title of "Marshal of the Army of God and Holy Church". He solemnly renounces his homage to John of England and begins to siege Northampton Castle. While this fails, Robert consolidates his forces. He turns to Prince Louis of France, son and heir apparent of King Philip II for support.source
• 1215May 17 – The gates to London are opened by supporters of the rebellious Barons. The houses of Jews are targeted for ransacking and burning. The rebels, under Robert Fitzwalter, call for the English nobles still on the side of King John to join them, and repair the walls. The Tower of London, held by John's supporters, is too well defended to fall into the hands of the rebels.source
• 1215June 1 – Mongol conquest of Jin China: After the long Battle of Zhongdu, the Mongol forces capture Zhongdu (modern-day Beijing). Meanwhile, Genghis Khan has decamped to the edge of the grasslands and is on his way back to the Kherlen River. Without his restraining influence, the Mongols run wild. They devastate and ransack the city, killing thousands. The royal palace goes up in flames, and a part of the capital burns for a month.source
• 1215August – King John of England rejects Magna Carta and writes to Innocent III – asking him to cancel the charter on grounds that he signed it against his will. At the same time, John continues to build up his mercenary army.source
• 1215October – The Barons offer the English crown to Louis of France and invite him to England. King John England confiscates the Barons' land and besieges Rochester Castle; the garrison is starved out and surrenders to him.source
• 1215December – First Barons' War: King John of England campaigns successfully in the Midlands and captures Nottingham Castle, on December 24. King Alexander II of Scotland joins the Barons and invades Northern England.source
• 1215King Kalinga Magha, from Kalinga Province in India, lands in Sri Lanka with a force of 24,000 men, to capture the city of Polonnaruwa and depose its king, Parakrama Pandya.source
• 1216April 22 – Battle of Lipitsa: The Kievan princes Mstislav Mstislavich and Konstantin of Rostov defeat Konstantin's younger brothers Yuri II and Yaroslav II for the rule of the Principality of Vladimir-Suzdal (modern Russia).source
• 1216May 18 – King John of England assembles a naval force to defend against a French invasion. Bad storms disperse the fleet, and John spends the summer reorganizing defenses across the country. He sees several of his military household desert to the barons, including his half-brother, William Longespée, who is the commander of John's army in the south.source
• 1216May 21 – Prince Louis of France, son of King Philip II ("Augustus"), invades England in support of the barons, landing in Thanet. He enters London without opposition, and is proclaimed, but not crowned, King of England at Old St Paul's Cathedral. In June, Louis captures Rochester Castle and Winchester, and soon controls over half of the English kingdom.source
• 1216June – The rebel English barons besiege Windsor Castle and Dover Castle; the latter is strategically important as the 'gateway to England', controlling the shortest route to France. Meanwhile, King John uses Corfe Castle in the southwest as his base of operations while he plans his campaign against the barons and the French invading army under Louis.source
• 1216July 24 – Albigensian Crusade: French forces under Raymond VII, count of Toulouse, besiege Castle Beaucaire in May. After three months, the occupants are running low on supplies and surrender to Raymond.source
• 1216Spring – First Barons' War: The English army, led by John, King of England ("Lackland"), sacks the town of Berwick-on-Tweed and raids southern Scotland. John pushes up towards Edinburgh over a ten-day period. On his return, he puts down a revolt in East Anglia. On March 24, he arrives at Hertford to deal with the challenge of a coming French invasion.source
• 1217May 20 – Battle of Lincoln: Henry III's forces led by William Marshal, 1st Earl of Pembroke defeat the French army of Prince Louis and the rebel barons who are besieging Lincoln Castle. During the battle, Thomas, Comte du Perche is killed and Louis is expelled from his base in the southeast of England. The looting that takes place afterward is known as the "Lincoln Fair". The citizens of Lincoln are loyal to Louis so Henry's forces sack the city. To the south, inhabitants of towns between Lincoln and London ambush and kill many of the French soldiers.source
• 1217August 24 – Battle of Sandwich: An English fleet under Hubert de Burgh, Earl of Kent defeats the French armada (10 large ships and 70 supply ships) in the English Channel, near Sandwich. The French fleet is commanded by Eustace the Monk, a mercenary and pirate, who fights for both the French and English when it suits his needs. The French fleet is bringing more men and supplies to assist Prince Louis, in his quest to take the English throne. The English capture Eustace's flagship, and Eustace himself is (while offering 10,000 marks for ransom) beheaded.source
• 1217September 21 – Livonian Crusade: The Livonian Brothers of the Sword and allied Livs and Letts defeat the Estonian army in the Battle of St. Matthew's Day, and kill their leader Lembitu.source
• 1217September: Leopold VI finds some ships in Split, that bring him and a small force to Acre. Andrew follows him about a fortnight later; in Split, he receives only two ships. The rest of Andrew's army is left behind. Meanwhile, King Hugh I of Cyprus lands at Acre, with troops to support the Crusade.source
• 1217November – In the Kingdom of Castile, former regent and Castilian nobleman, Álvaro Núñez de Lara, is captured and forced to relinquish all his castles.source
• 1217November – The Crusader army (some 15,000 men) under Andrew II sets out from Acre, and marches up the Plain of Esdraelon. Sultan Al-Adil I, on hearing that the crusaders are assembling, sends some Muslim troops to Palestine, to halt their advance. The crusaders move towards Beisan, while Al-Adil waits at Ajloun Castle, ready to intercept any attack on Damascus. He sends his son, Al-Mu'azzam, to cover Jerusalem. On November 10, Andrew's well-mounted army defeats Al-Adil at Bethsaida, on the Jordan River. Beisan is occupied and sacked; the Muslims retreat to their fortresses and towns.source
• 1217The Mongol army under Muqali (or Mukhali) attacks Hebei Province, as well as Shandong Province and Shaanxi Province (controlled by the Jin Dynasty). He returns to Genghis Khan's camp in Mongolia, and receives the hereditary of prince with the title "Grand Preceptor of the Empire", a golden seal, and a white standard with nine tails and a black crescent in the middle. He is appointed as commander-in-chief of operations in North China.source
• 1217Spring – First Barons' War: English forces of King Henry III besiege the French-controlled Mountsorrel Castle in Leicestershire. Prince Louis sends reinforcements (some 20,000 men) to assist the Barons in the castle. The English army lifts the siege and withdraws to Nottingham. Louis makes the mistake of moving the French forces to Lincoln Castle – where the English garrison holds out against previous attacks. Meanwhile, Henry's forces return to Mountsorrel Castle. This time Louis fails to arrive in time to prevent the razing to the ground of the castle.source
• 1218May 24 – A Crusader expeditionary force, (some 30,000 men) under King John I of Jerusalem, embarks at Acre (supported by Frisian ships), and sails for Egypt. They arrive at the harbour of Damietta, on the right bank of the Nile, on May 27. Sultan Al-Adil, surprised by the invasion, recruits an army in Syria, while his son Al-Kamil marches an Egyptian force northwards from Cairo, and encamps at Al-Adiliya, a few miles south of Damietta.source
• 1218June 24 – Siege of Damietta: The Crusader army assaults the fortified city of Damietta, but they repeatedly fail. As a result, the Crusaders create a new type of naval siege weaponry, attributed by the German chronicler Oliver of Paderborn: two ships are bound together, with a siege tower and ladder constructed on top.source
• 1218June 25 – Siege of Toulouse: During a counter-assault, Simon de Montfort is killed by a stone from one of the defender's siege engines. The leadership of the Albigensian Crusade falls to Simon's son Amaury de Montfort, who lifts the siege a month later. Raymond VI is restored as count of Toulouse after a popular rebellion.source
• 1218August 24 – After a fierce fight, the Crusaders manage to establish themselves on the ramparts of Damietta, and capture the fort.source
• 1218Al-Kamil decides to offer the Crusaders a deal, Jerusalem in exchange for their departure from Egypt. John I favored accepting this offer but Pelagius refuses, unless it also includes Kerak Castle and other former castles of Jerusalem, to the east of the Jordan River. Al-Kamil refuses these strategically important sites, and Pelagius rejects the offer. This angers the Crusaders – who consider Jerusalem their important goal.source
• 1218Jochi, eldest son of Genghis Khan, leads a successful campaign against the Kyrgyz. Meanwhile, Genghis sends a caravan with precious gifts to Muhammad II, ruler (shah) of the Khwarazmian Empire, hoping to establish trade relations. However, Inalchuq, Khwarazmian governor of Otrar, attacks the caravan, claiming that the caravan contains spies. Genghis then sends a second group of three ambassadors to Muhammad to demand the merchants be set free. Muhammad refuses, and the merchants along with one of the ambassadors are executed.source
• 1218Spring – Genghis Khan dispatches a Mongolian army (some 20,000 cavalry) under Jebe, to deal with the Qara Khitai (or Western Liao) threat. Meanwhile, he sends Subutai with another army on a simultaneous campaign against the Merkits. Jebe defeats a force of 30,000 men led by Prince Kuchlug at the Khitan capital Balasagun. Kuchlug flees south to modern Afghanistan, but is captured by hunters – who hands him over to the Mongols. After Kuchlug is beheaded and paraded through the cities of his new domains, Genghis annexes the entire Khitai empire under Mongol rule.source
• 1218Ivan Asen II becomes ruler (tsar) of the Bulgarian Empire, during his reign he will add Epirus, as well as parts of Albania and Macedonia to his realm.source
• 1219April 7 – Al-Muzaffar II, Ayyubid ruler of Hama, arrives Egypt with Syrian reinforcements, leading multiple attacks on the Crusader camp at Al-Adiliya, with little impact. In the meantime, new Crusader forces bring badly needed supplies. Egyptian attacks continue through May, with Crusader counter-attacks utilizing a Lombard device known as a carroccio, confounding the defenders.source
• 1219June 15 – Livonian Crusade: Danish Crusaders led by King King Valdemar II (the Victorious), conquer Tallinn in the Battle of Lyndanisse. What is to become the flag of Denmark (Dannebrog) allegedly falls from the sky during that battle. Their stronghold in Tallinn will help the Danes conquer the entirety of Danish Estonia.source
• 1219July 8 – Pelagius begins multiple attacks at Damietta, using Pisan and Venetian troops. Each time they are repelled by the defenders, using Greek fire. A counter-offensive led by Al-Kamil on the Templar camp is repulsed on July 31 by their new Grand Master Peire de Montagut, supported by the Teutonic Knights – where the Crusaders reform and pursue the enemy outside the gates.source
• 1219August 29 – The Crusaders attack the Egyptian camp in the Battle of Faraskur and the Muslims pretend a feigned retreat to Mansoura. John I advises to camp overnight, because there is no fresh water in the region between the Nile and Lake Manzalah. Al-Kamil decides to halt the retreat and turns his forces to deliver a smashing attack upon the disorganized Crusaders, losing some 4,300 men.source
• 1219October – Al-Kamil sends two captive knights as envoys, to renew his former offers of an armistice. If the Crusaders evacuate Egypt, he will return the True Cross (lost in the Battle of Hattin) and they can have Jerusalem, all central Palestine and Galilee. John I advised its acceptance, along with the nobles from England, France and Germany. Pelagius again refuses the peace terms.source
• 1219November 5 – Siege of Damietta: The Crusaders enter Damietta and find it abandoned. Seeing the Crusader standards flying from the towers, Al-Kamil hastily abandons his camp at Faraskur and withdraws to Mansoura. Survivors in the city are either sent into slavery or held as hostages to trade for Christian prisoners. On November 23, the Crusader army captures the city of Tinnis.source
• 1219Mongol forces under Chagatai and Ögedei capture Otrar after a 5-month siege. The city becomes the first of many settlements to have its entire population slain or enslaved before it is razed to the ground. Inalchuq, the Khwarezmian governor of Otrar, is captured and executed by pouring molten silver into his eyes and ears – an unlikely and unnecessarily expensive end.source
• 1219Twenty-four Lithuanian dukes and nobles purportedly sign a peace treaty with Halych-Volhynia, stating a common cause against invading Christian Crusaders.source
• 1220March – Mongol forces led by Genghis Khan besiege Samarkand, the city is defended by some 40,000 men, including a brigade of 20 war elephants. On the third day, the garrison launches a counter-attack, the defenders sent out their elephants, which panic, turn and trample their own men before escaping onto the open plain. Muhammad II attempts to relieve Samarkand twice but is driven back. After a week, the remainder of the garrison surrenders. The city's inhabitants, numbering some 100,000 are enslaved or slaughtered.source
• 1220August 8 – Battle of Lihula: Estonian forces encircle the Lihula stronghold, occupied by an invading Swedish Crusader army. The Swedish troops along with Karl the Deaf try to make their way out, but they are killed.source
• 1220November – Genghis Khan dispatches his youngest son Tolui, at the head of an army (around 50,000 men), into the Khwarazmian province of Khorasan. His forces also include 300 catapults, 700 mangonels to discharge pots filled with naphtha, 4,000 storming-ladders, and 2,500 sacks of earth for filling up moats. Among the first cities to fall is Termez (captured after a two-day siege) and later Balkh.source
• 1220Polish forces under Konrad I drive out the heathen Prussians, from the Masovian territory of Chełmno Land.source
• 1220Summer – Raymond-Roupen, prince of Antioch, invades Armenian Cilicia, together with his mother, Alice, and establishes himself at Tarsus. There he waits for help from the Knights Hospitaller. Constantine of Baberon, a powerful Armenian nobleman and regent for Queen Isabella, marches with his forces to the Tarsus stronghold.source
• 1220Autumn – Genghis Khan moves against the wealthy city of Urgench. He is joined by his eldest son Jochi, now conqueror of half a dozen lesser towns who attacks it from the north. Despite a stout defense, the city is taken after a 5-months siege. The Mongols have to fight for Urgench street by street, razing many houses. Jochi is given the right to loot the city for himself, but prefers to negotiate with the locals to avoid property damage. This is refused by Genghis, who removes Jochi from command and appoints Ögedei instead.source
• 1221February – The cities of Merv (perhaps the world's largest up to this date), Herat and Nishapur which have peacefully surrendered rise up in arms. Genghis Khan sends his son Tolui to spend an extra month to subdue the revolts. Contemporary scholars report over a million people are systematically killed in a genocide.source
• 1221July 4 – Pelagius orders a three-days fast in preparation for the advance. King John I of Jerusalem arrives at Damietta to rejoin the Crusade at the command of Honorius III. The Crusader force moves towards Sheremsah, halfway between Faraskur and Mansoura on the east bank of the Nile, occupying the city on July 12. Sources tell of 630 ships of various sizes, 5,000 knights, 4,000 archers, and 40,000 men. A horde of pilgrims march with the army. They are ordered to keep close to the river, to supply the Crusaders with water. Pelagius plans a new offensive and leaves a large garrison at Damietta.source
• 1221August 28 – Pelagius sues for peace and sends an envoy to Al-Kamil. The terms of surrender are accepted, which includes the retreat from Damietta – leaving Egypt with the remnants of the Crusader army and an 8-year truce. After prisoners are exchanged, Al-Kamil enters Damietta on September 8. The Fifth Crusade ends with nothing gained for the West, with much lost, men, resources and reputations. The Crusaders blame Frederick II for not being there. Pelagius is accused of ineffectual leadership and a misguided view, which has led to rejecting the sultan's peace offerings.source
• 1221October – The Mongol army raids Georgia for the second time, and Subutai and Jebe allow their forces to pass through the Caucasus Mountains.source
• 1221November 24 – Battle of the Indus: Left with some 20,000 men, Jalal al-Din Mangburni has headed for the Indus River where Genghis catches up with him. In a desperate battle the Khwarezmain forces are destroyed, completing the Mongol conquest of the Khwarazmian Empire, while Jalal al-Din flees across the river and escapes into India.source
• 1221The Maya of the Yucatán revolt against the rulers of Chichen Itza.source
• 1221Siege of Tallinn: An Estonian Crusader army tries to conquer the Danish stronghold of Tallinn with the help of Revalians, Harrians and Vironians. They besiege the stronghold for 14 days but finally retreat their forces.source
• 1222After the invasion and destruction of the Khwarezmian Empire in 1221, Genghis Khan returns to Mongolia, and a rebellion sparks in Helmand, to which the response is a large army led by Ögedei Khan sent into the region to put an end to the rebellion of Muhammad the Marghani, resulting in the killing of every man in Ghazni and Helmand, and the enslavement and selling of most of the women of the region.source
• 1222The Ghurid dynasty capital of Firozkoh (in modern-day Afghanistan) is destroyed, by Mongol Emperor Ögedei Khan.source
• 1223January 18 – After a failed attempt on December 28, the Mongol General Muqali leads a second attack on the Chinese fortress of Fengxiang and fails.source
• 1223January 29 – Battle of Viljandi: During a church service, the Sakalians attack the Germans inside the stronghold of Viljandi Castle. The Estonian forces kill members of the Livonian Brothers of the Sword and many merchants.source
• 1223February 6 – Dispatched by Genghis Khan, the Mongol General Muqali makes a third and final attempt to capture Fengxiang, but fails again, ending the Mongol attempts.source
• 1223April – The Russian princes lead their separate armies from different parts of Russia, to assemble 60 kilometres downriver from Kiev. There are three main groups of princes taking part in the campaign; the Kievan army is represented by Grand Prince Mstislav Romanovich (the Old). The second group are the Chernigov and Smolensk armies under Prince Mstislav II. The third group is the Galician-Volhynian army under Mstislav Mstislavich with his son-in-law Daniel of Galicia, leaving from northern Ukraine.source
• 1223May 15 – The Russian army gathers on the island of Khortytsia, later to become a famous Cossack base, at the mouth of the Dnieper River, next to modern-day Zaporizhzhia (Ukraine). The main Polovtsian forces led by Köten Khan, join the Russians here, which consist entirely of mounted archers. Compared to this, some 20,000–25,000 Mongols assemble and build a defensive encampment on the high ground, probably on the northern slopes of the Mohila Bel'mak hills, located near the Konka River.source
• 1223May 16 – Mstislav Mstislavich leads a small detachment of his own men, and some Polovtsians to the far bank of the Dnieper River – where they attack a part of the Mongol advance guard. The Mongols promptly fleeing into the steppes. Mstislavich pursues them and captures their commander named Gemyabek or Hamabek who seeks refuge behind a wooden fence surrounding a Polovtsian burial site. The captive's fate is sealed when the Polovtsians ask Mstislavich to hand him over – to execute.source
• 1223May 31 – Battle of the Kalka River: The Russian cavalry successfully attacks the Mongol vanguard and crosses the Kalka River in what is now Ukraine. The Polovtsian and Volhynian cavalry led by Daniel of Galicia form the Russian vanguard. Meanwhile, the army of Kiev waits on the western side of the Kalka River. The Russians fail to co-ordinate their attacks, they advance in separate formations and become divided by the Kalka River. In the afternoon, the Russian army collapses under continuous Mongol attacks.source
• 1223June – Mstislav Mstislavich escapes back to the Dnieper River with the remnants of his Galician army. Mstislav Romanovich (the Old) surrenders and is executed. According to sources, he and other Russian nobles are slowly suffocated to death during a Mongol 'drunken feast', they are tied up and laid flat on the ground beneath what is described as a wooden 'bridge' (or platform), on which Subutai, Jebe and their officers feast. This is revenge for killing the Mongol ambassadors.source
• 1223October 8 – At Montgomery in Wales, King Henry III of England reaches a peaceful settlement with Llywelyn ab Iorwerth, the powerful ruler of the semi-independent Principality of Gwynedd, following a mediation by Ranulf de Blondeville, the Earl of Chester.source
• 1223The Mongol army invades Polovtsian territory and defeats the Polovtsians in a great battle near the Don River. Several Polovtsian leaders are killed – while the remainder flees westwards, across the Dnieper River, to seek support by various Russian princes. Steppe lands east of the Dnieper fall under Mongol control, Subutai and Jebe raise the wealthy city of Astrakhan on the Volga River. Subutai now parts his forces, he moves south to the Crimea (or Tauric Peninsula), while Jebe travels towards the Dnieper.source
• 1223Late April – The Russian and Polovtsian armies march down the west bank of the Dnieper River. Within a few days of the march beginning, a second group of Mongol ambassadors appear in the Russian camp and again offer peace. When their offers are rebuffed, the ambassadors are allowed to leave unharmed. Meanwhile, Russian forces from Galicia arrive by boat or cart-loads of equipment and food, along the Black Sea coast and up the Dnieper River, screened by Mongol forces on the east bank.source
• 1223Mongol forces capture the nominally Genoese trading outpost of Sudak, probably with the tacit approval of neighbouring rival Venetian outposts in the Crimea. Subutai promises to destroy any non-Venetian colonies in the area. In return, the Venetians provide Subutai with information about the kingdoms in Eastern Europe. Meanwhile, Köten Khan, Cuman/Kipchak chieftain of the Polovtsians, convinces Prince Mstislav Mstislavich of Galicia to form an alliance, and informs him of his plight against the Mongols.source
• 1223Late May – The Mongol army under Subutai and Jebe establishes a defensive position on the Kalka River. Increasing disagreements amongst the Russian princes, about the wisdom of continuing to pursue the Mongols deeper into the steppes. By the end of May, the allied forces reach the banks of the Kalka River. The Polovtsian vanguard is way ahead of the rest of the Russian army, which gives them a triumphant feeling. Meanwhile, Subutai and Jebe set up a trap against the Russian forces.source
• 1223Livonian Crusade: The Estonians revolt against the Livonian Brothers of the Sword and Denmark, and for a brief period reconquer all of their strongholds except for Tallinn.source
• 1223Battle of Samara Bend: A Volga-Bulgarian army under Ghabdula Chelbir defeats the Mongols, probably led by Subutai, Jebe and Jochi. The Bulgars retreat during the battle but the Mongols pursue them. Then the main Bulgar forces ambush the Mongols. Subutai and Jebe retreat their forces near the city of Sarai (future capital of the Golden Horde), not far from where the Volga River empties into the Caspian Sea.source
• 1223Spring – The Polovtsian army assembles on the Terek River lowlands and are joined by Alan, Circassian, and Don Kipchak/Cuman forces. The Mongol army crosses the Caucasus Mountains, but is trapped in the narrow mountain passes. The Mongol generals Subutai and Jebe (the Arrow) send an embassy to the Polovtsians and convince them to break their alliance with the Caucasian peoples. The Mongol cavalry invades the Caucasus region and devastates the local villages, seizing slaves, cattle and horses.source
• 1223The Mongol leaders Subutai and Jebe receive news that Jochi, who camps north of the Caspian Sea, will not be able to provide the expected reinforcements due to Jochi's reported illness or suspected refusal to obey his father Genghis Khan's orders. Subutai sends an embassy to the Russian princes, to offer peace and perhaps attempt to break the Russian alliance with the Polovtsians. But the Mongol ambassadors are executed – a task eagerly carried out by Köten Khan's followers, by the end of April.source
• 1224May 5 – King Louis VIII (the Lion) declares war on King Henry III of England. He allies himself with Hugh X of Lusignan and invades first Poitou and then Northern Gascony. The English forces in Poitou are under-strength and lack support from the Poitevin nobles; as a result, the province quickly falls into French hands by the end of June.source
• 1224June 20 – The siege of Bedford Castle by King Henry III of England begins.source
• 1224August 15 – The garrison at Bedford Castle, belonging to Falkes de Bréauté, surrenders to Henry III after a two-month siege that ends after the castle has been undermined by a fire and fallen. After the garrison surrenders, the defenders are all hanged by order of the king. Falkes is allowed to leave the country but loses all his possessions. Bedford Castle is badly damaged as a result.source
• 1224September – Abdallah al-Adil (the Just), governor in Al-Andalus, challenges the Almohad throne and captures Seville. He marches to Marrakesh to confront Abu Muhammad al-Wahid. Abdallah seizes the royal palace and deposes Muhammad al-Wahid, who is strangled to death.source
• 1224October – Lý Huệ Tông, Emperor of Vietnam, cedes the throne to his second daughter, the Princess Chiêu Thánh, who becomes the Empress Regnant Lý Chiêu Hoàng. Trần Thủ Độ then arranges a marriage between the Empress and Trần Cảnh, the 8-year-old son of Trần Thừa, and ends the rule of the Lý dynasty by making the Empress pass the throne to Trần Cảnh the following year.source
• 1224Livonian Crusade: The Livonian Brothers of the Sword defeat the Estonians and reconquer the captured strongholds on the Estonian mainland. With the surrender of the Tartu stronghold, only the islands of Saaremaa and Muhu remain under Estonian control.source
• 1224Spring – The Mongol army led by Subutai and Jochi cross the steppes of modern Kazakhstan, and returns to the horde of Genghis Khan on the Irtysh River. At a great kurultai or gathering of chiefs, Subutai reports on the Western campaign. Jochi submits to Genghis and his supposed 'insubordination' (see 1220) is forgiven. As a result of the Mongol invasion in 1219–1223, Kazakhstan and Central Asia become part of the Mongol Empire.source
• 1224Spring – Falkes de Bréauté, English high sheriff and a rival of Henry III, refuses to relinquish his castles and starts a rebellion. Cardinal Stephen Langton and forces under Hubert de Burgh, Earl of Kent deal with Falkes and the castles are handed over. Falkes is found guilty of 16 counts of wrongful disseisin; he and his brother William are excommunicated by Langton.source
• 1225May 30 – King Louis VII of France meets in Péronne with a hermit who claims to be Baldwin IX, Count of Flanders and the Latin Emperor of Constantinople, who had not been seen in public since being taken a prisoner in Bulgaria. Concluding that the hermit is an impostor, King Louis gives the man three days to leave France, and the "false Baldwin" instead leads a rebellion, eventually losing and being executed.source
• 1225July 25 – Jalal al-Din Mangburni dethrones Muzaffar al-Din Uzbek, ruler (atabeg) of the Eldiguzids, and sets himself up in the capital of Tabriz (modern Iran).source
• 1225November 17 – After being taken prisoner of war at the Battle of Mölln in January, the Danish governor Albrecht signs the Peace of Bardowick in order to obtain his freedom, ceding Holstein to Adolf of Schauenberg, in addition to releasing King Valdemar II of Denmark and his son Valdemar the Younger, who both had been kidnapped in 1223 and held as prisoners.source
• 1225Summer – Battle of Garni: Khwarezmid forces led by Jalal al-Din Mangburni defeat the Georgian army (some 70,000 men) at Garni. The royal court of Queen Rusudan moves to Kutaisi, while the Georgian capital Tbilisi is besieged by the Khwarezmians.source
• 1225Autumn – Subutai is assigned a new campaign by Genghis Khan against the Tanguts. He crosses the Gobi Desert with a Mongol army and advances south into the Western Xia (or Xi Xia). Meanwhile, Genghis, in his mid-sixties, becomes wounded during hunting. His injury – a dislocated shoulder, perhaps, or a bruised rib – forces him to take some rest.source
• 1225Iltutmish, Ghurid ruler of the Delhi Sultanate, repels a Mongol attack and invades Bengal. His rival, Ghiyasuddin, leads an army to halt Iltutmish's advance, but decides to avoid a conflict by paying him tribute and accepting his suzerainty.source
• 1226February 25 – (Karoku 2, 27th day of 1st month) In Japan, 8-year-old Kujō Yoritsune is raised to the status of the Shōgun Fujiwara no Yoritsune of the Kamakura shogunate by the Emperor Go-Horikawa, but the power over the Imperial military remains with the regent Hōjō Yoshitoki.source
• 1226March 9 – Khwarazmian Empire forces commanded by the Muslim Sultan Jalal al-Din Mangburni capture Tbilisi, capital of the Kingdom of Georgia. After the capture, the massacre of thousands of its Christian inhabitants begins as residents are given the choice between converting to Islam or being put to death.source
• 1226June 7 – King Louis VIII of France begins the Crusade against the Cathars (Albigensians) in southern France and against Raymond VII, count of Count of Toulouse. Over the next three months, the Crusaders capture the cities of Béziers, Carcassonne, Beaucaire and Marseille and by Avignon's surrender on September 9, Louis forces the region of Languedoc into submission, and reasserts his authority upon the autonomous municipalities of his estates. Most cities have to accept the authority of Ramon Berenguer IV, count of Provence, but Marseille and Nice rebel.source
• 1226August 8 – Siege of Avignon: After two months without forcing the defenders of Avignon to surrender from lack of food, King Louis VIII gives the order to assault the walls of the city and Guy II, Count of Saint-Pol, begins the second phase of the siege, digging trenches facing the city walls – which are connected on both sides of the Rhône with pontoon bridges. Firing from the fortress towers, the defenders repulse the attack and Count Guy is killed by a catapulted stone on the same day.source
• 1226September 9 – After Avignon's defenders negotiate a peaceful resolution with the French Army by the payment of an indemnity of 6,000 marks, the gates of the walled city are opened and Louis enters the city without violence.source
• 1226October 30 – Trần Thủ Độ, head of the Trần dynasty of Vietnam, forces Lý Huệ Tông, the last emperor of the Lý dynasty, to commit suicide.source
• 1226Rǫgnvaldr Guðrøðarson is overthrown as ruler of the Kingdom of the Isles, and is replaced by his half-brother, Olaf the Black.source
• 1226King Sancho II of Portugal ("the Pious") launches an offensive against the Almohad Caliphate during the Reconquista, and takes the city of Elvas.source
• 1227July 22 – Battle of Bornhöved: Count Adolf IV of Holstein – leading a coalition army from the cities of Lübeck and Hamburg, defeats the Danish-German forces of King Valdemar II, and the Welf nobleman Otto I (the Child). Adolf shakes off Danish supremacy and accepts an overlordship by the Archbishopric of Bremen under Archbishop Gerhard II of Lippe. Adolf expands his power and establishes new frontiers within the Holy Roman Empire.source
• 1227July 28 – Battle of Ane: Forces of the Bishopric of Utrecht are defeated by the rebellious Drenths led by Rudolph van Coevorden near Ane (modern Netherlands). The Drenths lure the Bishop's forces, supported by heavily armoured knights, in an ambush into a swampy area and kill Bishop Otto II of Lippe. After the battle, Otto's successor, Wilbrand van Oldenburg, rouses the Frisian people into supporting the war against the Drenths.source
• 1227November 24 – Prince Leszek I (the White) is assassinated in an ambush on a council of Polish dukes in the city of Gąsawa, an event which later becomes known as the Gąsawa Massacre.source
• 1227Spring – Livonian Crusade: The Livonian Brothers of the Sword and their Crusader allies (some 20,000 men) cross the sea ice from mainland Estonia, and defeat the last Estonian strongholds in the Battle of Muhu and the siege of the Valjala Stronghold in the Saaremaa islands. This marks the end of the Estonian campaign in the Livonian Crusade. The Sword Brothers conquer Danish Estonia, and Tallinn is given town rights under Riga law.source
• 1227Siege of Yinchuan: Mongol forces eliminate the Western Xia (or Xi Xia) and execute Emperor Mo (or Li Xian). Genghis Khan dies during the siege under debated circumstances, but this is kept secret from the army until the siege's end. Yinchuan is pillaged and its entire population is slaughtered or sold into slavery. Genghis orders the imperial family to be executed, effectively ending the Tangut royal lineage.source
• 1227Swedish-Novgorodian War: Grand Prince Yaroslav II of Vladimir leads an attack from the Novgorod Republic on Baltic Finnic peoples in eastern Fennoscandia, called "Yem", whom he devastates.source
• 1228November – Frederick II puts pressure on the negotiations by a military display. He assembles his Crusader army and marches down the coast to Jaffa – which he proceeds to refortify. At the same moment, Ayyubid forces under An-Nasir Dawud, who are not participating in the revolt at Damascus, move to Nablus, to intercept Al-Kamil's supply lines. Al-Kamil breaks off the negotiations, saying that the Crusaders have pillaged several Muslim villages, and only resumes them again when Frederick pays out compensation to the victims.source
• 1228King Sukaphaa establishes the Ahom Dynasty and becomes the first Ahom ruler in Assam (until 1268).source
• 1228Autumn – Frederick II receives an embassy of Egypt's Sultan Al-Kamil, including Fakhr al-Din ibn as-Shaikh, at the Hospitaller camp at Recordane, near Acre. Meanwhile, Al-Kamil is engaged in suppressing a rebellion in Syria and has concentrated his forces on a siege at Damascus. Frederick is pressed for time, because his army is not large enough for a major campaign. Al-Kamil, who has full control of Jerusalem, starts diplomatic negotiations.source
• 1228Battle of Bolnisi: Khwarazmian forces led by Sultan Jalal al-Din Mangburni defeat a coalition of Georgians, Kipchaks, Alans, Vainakhs and Laks (some 40,000 men) at Bolnisi (modern Georgia).source
• 1229March 6 – University of Paris strike: Students begin to riot, after a dispute over a bill with a tavern proprietor. Queen Blanche of Castile demands retribution, and allows the city guard to punish the student rioters. She puts an economic strain upon the student quarter of Paris (the Latin Quarter), where Latin is commonly heard in the streets.source
• 1229March 17 – Frederick II enters Jerusalem, escorted by German and Italian troops. Of the Military Orders only the Teutonic Knights are represented and some clergy. He receives the formal surrender of the city by Al-Kamil's governor (or Qadi), who hands him the keys of Jerusalem. The procession then passes through streets to the old building of the Hospital (or the Muristan), where Frederick takes up his residence in the Christian Quarter.source
• 1229May 1 – Frederick II departs from Acre, while he and his suite pass down the "Street of the Butchers" to the harbour, the people crowd out of the doors, and pelts him with entrails and dung. Meanwhile, Odo of Montbéliard (or Eudes), commander of the Crusader army, and John of Ibelin, lord of Beirut, are left behind to quell the unrest in Palestine.source
• 1229May – Frederick II arrives at Cyprus, where he attends the wedding proxy of the 12-year-old King Henry I (the Fat) to Alice of Montferrat – whose father is one of his staunch supporters in Italy. On June 10, Frederick lands at Brindisi, where the papal army under his father-in-law John of Brienne has invaded the Italian territories in Campania (→ War of the Keys).source
• 1229June – Emir Al-Ashraf Musa captures Damascus and acknowledges the supremacy of his elder brother Al-Kamil. His other brother, An-Nasir Dawud, is compensated with the lordship of Al-Karak in the Transjordan region.source
• 1229November 28 – Battle of Olustra: Eric XI (the Lisp and Lame) is defeated and deposed as king of Sweden by Canute II (the Tall), who proclaims himself the new ruler.source
• 1229Abu Zakariya Yahya expands his influence by conquering the cities of Constantine and Béjaïa (modern Algeria). He becomes the founder and first ruler of the Hafsid Dynasty in Ifriqiya.source
• 1230April 30 – English invasion of France: King Henry III embarks from Portsmouth with a large expeditionary force. On May 2, he arrives on the island of Guernsey, and the next day the English army lands at Saint-Malo, where Peter I (de Dreux), duke of Brittany, meets Henry to pay him homage. The English forces march through the County of Anjou, taking the castle of Mirebeau in late July.source
• 1230October 27 – Henry III signs a truce with King Louis IX of France ("the Saint") and returns to Portsmouth. He leaves a small force under Peter I and Ranulf de Blondeville, to act against the French in Brittany and Normandy.source
• 1230Reconquista – King Alfonso IX of León defeats Ibn Hud al-Yamani (known as Almogàver by the Christians). This success opens the road to Badajoz to the Leonese troops. The Portuguese king Sancho II continues his offensive southward and takes Beja, Juromenha, Serpa and Moura.source
• 1230Siege of Galway in Ireland: Norman forces under Richard Mór de Burgh invade Connacht and desolate a large portion of the country. He besieges Galway, but is forced to retreat after a week-long inconclusive battle.source
• 1230Battle of Yassıçemen: A Seljuk-Ayyubid coalition (some 40,000 men) defeats the Khwarazmians under Sultan Jalal al-Din Mangburni at Erzincan on the Upper Euphrates.source
• 1231August – Ögedei Khan orders the invasion of Korea. A Mongol army crosses the Yalu River and quickly secures the surrender of the border town of Uiju. The Mongols are joined by Hong Pok-wŏn, a Goryeo general, who takes their side with his subordinates numbering some 1500 families.source
• 1231War of the Lombards: Richard Filangieri sails for Beirut, where the town is handed over to him. He occupies Sidon and Tyre – while other Lombard forces appear before Acre. At Acre, Filangieri summons a meeting of the High Court and shows letters from Frederick II appointing him as ambassador (baili).source
• 1231Siege of Kuju: Mongol forces besiege the city of Kuju. They deploy assault teams who man siege towers and scale ladders. Despite the fact the Goryeo army is heavily outnumbered, the garrison refuses to surrender.source
• 1231Castillian forces under King Ferdinand III ("the Saint") re-conquer the city of Quesada.source
• 1231Spring – Hubert de Burgh, Earl of Kent becomes a powerful lord in the Welsh Marches, controlling the castles at Cardigan and Carmarthen. He begins to threaten the local Welsh leaders, Llywelyn the Great launches a campaign against Norman lordship in Wales.source
• 1231Battle of Jerez: Ferdinand III defeats Emir Ibn Hud of the Taifa of Murcia.source
• 1231Autumn – Frederick II appoints Marshal Richard Filangieri as his imperial legate, and sends an expeditionary army of mostly Lombards for the defense of Jerusalem. He gathers some 600 knights, 100 "sergeants-at-arms", 700 armed infantrymen, and 3,000 marines. The army is supported by 32 war-galleys.source
• 1232April 8 – Mongol–Jin War: The Mongol army led by Ögedei Khan and his brother Tolui begins the Siege of Kaifeng (1232), capital of the Chinese Jin dynasty. During the summer, the Jurchens try to end the siege by negotiating a peace treaty, but the assassination of a Mongol embassy makes further talks impossible. While the negotiations are going on, a plague is devastating the population of the city. In the meantime, supplies stored at Kaifeng are running out, and several residents of the city are executed on the suspicion that they are traitors.source
• 1232June 15 – Battle of Agridi: The Cypriot army under King Henry I ("the Fat") defeats the Lombard forces of Emperor Frederick II. After the battle, John of Beirut (supported by funds from Henry), hires 13 Genoese war-galleys to aid in the siege of Kyrenia.source
• 1232June – Mongol invasion of Korea: Choe Woo, Korean military dictator of Goryeo, orders against the pleas of King Gojong and his senior officials, the royal court, and most of Songdo's population to be moved to Ganghwa Island. Woo starts the construction of strong defenses on Ganghwa Island, which becomes a fortress. The government orders the common people to flee the countryside and take refuge in major cities, mountain citadels, or nearby islands. The Mongols occupy much of northern Korea, but fail to capture Ganghwa Island.source
• 1232July 16 – Muhammad I is elected as ruler of the Taifa of Arjona. He revolts against Ibn Hud, the independent ruler of Al-Andalus, and takes control of the city, beginning the foundation of the Nasrid dynasty.source
• 1232July 29 – King Henry III dismisses his justiciar (chief justice minister) and regent Hubert de Burgh, Earl of Kent, and replaces him with the Frenchmen Peter des Roches and Peter de Rivaux, thereby irritating his barons.source
• 1232December 16 – Battle of Cheoin: Korean forces defeat a Mongol attack at Cheoin (modern-day Yongin). The Mongol Empire concludes a peace treaty with Goryeo and withdraws its forces.source
• 1232The original set of woodblocks of the Tripitaka Koreana is destroyed by fire during the Second Mongol invasion of Korea.source
• 1233May 29 – Mongol–Jin War: The Mongol army led by Ögedei Khan captures Kaifeng, capital of the Jin dynasty ('Great Jin'), after the 13-month Siege of Kaifeng (1232). The Mongols plunder the city, while Emperor Aizong of Jin flees for the town of Caizhou. Meanwhile, Ögedei departs and leaves the final conquest to his favoured general, Subutai.source
• 1233August – Richard Marshal, 3rd Earl of Pembroke, signs an alliance with Llywelyn the Great, to join forces to revolt against King Henry III. Richard is faced by demands from royal bailiffs in September – where the garrison of Usk Castle is forced to surrender.source
• 1233November – Henry III's army camped at Grosmont Castle is attacked in the night, by a force of Welsh and English rebels. Several of Henry's supporters are captured, and the castle is returned to Hubert de Burgh, Earl of Kent, one of the rebels.source
• 1233December – Siege of Caizhou: The Mongols under Ögedei Khan besiege Caizhou and ally themselves with the Chinese Song dynasty to eliminate the Jin Dynasty.source
• 1233Winter – Reconquista: King Ferdinand III of Castile ("the Saint") conquers the cities of Trujillo and Úbeda. The Castilian army besieges the city of Peniscola. Ferdinand forces Ibn Hud, ruler of the Taifa of Zaragoza, to sign a truce.source
• 1233Gendt receives its city rights from Otto II ("the Lame"), count of Guelders (modern Netherlands).source
• 1233War of the Lombards: Lombard forces at Kyrenia surrender to John of Beirut, after a 10-month siege. The defenders, with their personal belongings, are allowed to retire to Tyre. Captured prisoners are exchanged for those held by Richard Filangieri, commander of the Lombards, at Tyre. Cyprus is wholly restored under the rule of the 16-year-old King Henry I ("the Fat"). His vassals are rewarded, and loans that they have made are repaid.source
• 1234February 9 – Mongol conquest of the Jin dynasty: The Mongol army led by Ögedei Khan captures the Jin capital at Caizhou, after the two-month Siege of Caizhou). Emperor Aizong of Jin abdicates the throne to Wanyan Chenglin, a descendant of the Jin imperial clan. After the Mongol and Song forces have breached the city walls, Aizong tries to escape, but commits suicide to avoid being captured. This marks the end of the Jin dynasty (1115–1234) ('Great Jin') in China.source
• 1234Reconquista – King Sancho II of Portugal conquers the cities of Aljustrel and Mértola from the Moors.source
• 1235Siege of Constantinople: The Byzantine emperor John III Doukas Vatatzes and the Bulgarian tsar Ivan Asen II besiege Constantinople in an attempt to take it from its Latin rulers, John of Brienne and Baldwin II. Angelo Sanudo successfully negotiates a two-year truce.source
• 1235Approximate date – Battle of Kirina: Mandinka prince Sundiata Keita defeats Sosso king Soumaoro Kanté, beginning the Mali Empire. By tradition, the Manden Charter, a constitution, is proclaimed in Kouroukan Fouga.source
• 1236June 29 – Siege of Córdoba: Castilian forces under King Ferdinand III ("the Saint") capture Muslim Córdoba from Emir Ibn Hud as part of the Reconquista of the Iberian Peninsula.source
• 1236September 22 – Battle of Saule: The Lithuanians and Semigallians defeat the Livonian Brothers of the Sword at Šiauliai in Lithuania.source
• 1236Autumn – Siege of Bilär: The Mongols under Batu Khan capture the capital city of Bilär after a siege that lasts for 45 days. The Volga Bulgars are defeated within the year, as are the Kipchaks and Alans.source
• 1236Mongol conquest of the Song dynasty: The Mongols under Ögedei Khan penetrate deep into the Southern Song. The important city of Xiangyang, gateway to the Yangtze plain, capitulates to them.source
• 1236The Goryeo court in Korea orders the preparation of another set of woodblocks for printing the Buddhist Tripiṭaka ("Triple Basket") – which is intended both to gain protection against the Mongol invaders and to replace the earlier 11th century set that was destroyed by the Mongols in 1232.source
• 1237August 15 – Battle of the Puig: Aragonese forces under Bernat Guillem de Montpeller defeat the Muslim army (some 12,000 men) of the Taifa of Valencia at El Puig. The Almohad forces are routed, and many of the soldiers are slain in the action. Zayyan ibn Mardanish, Almohad ruler and governor of Valencia, is forced to go into exile to Tunisia, while offering the surrender of all castles from the Turia River to Tortosa and Teruel.source
• 1237November 27 – Battle of Cortenuova: Frederick II defeats the forces of the Lombard League; about 5,000 Lombards are captured. Frederick makes a triumphal entry into the allied city of Cremona in the manner of an ancient Roman emperor, with the captured carroccio (later sent to the commune of Rome), and an elephant. During the winter campaign, Frederick captures the Piedmontese cities of Lodi, Novara, Vercelli, Chieri, and Savona.source
• 1237December 16–21 – Siege of Ryazan: The Mongols under Batu Khan lay siege to Ryazan. The townspeople repel the first Mongol attacks but after 5 days the city walls are breached by Chinese catapults. On December 21, the Mongols storm the walls and plunder the capital, killing Yuri Igorevich and all inhabitants. Yuri II of Vladimir stands by and does nothing to intervene while Ryazan burns.source
• 1237December – Siege of Kolomna: Rus' forces under Yuri II of Vladimir are besieged and annihilated at Kolomna by the Mongols. Yuri barely escapes to Yaroslavl. The defenceless capital of Vladimir is taken after just 2 days. Yuri's wife Agatha (sister of Michael of Chernigov) and all his family die in Vladimir when a church where they have sought refuge from the fire collapses.source
• 1237Livonian Crusade: The Livonian Brothers of the Sword are absorbed into the Teutonic Order, as the autonomous Livonian Order. An Estonian rebellion begins on Saaremaa Island (located in the Baltic Sea).source
• 1237Autumn – Mongol invasion of Kievan Rus': The Mongol army commanded by Batu Khan and Subutai, invades the Principality of Ryazan (with representatives of all four khanates leading some 100,000 Mongol, Turks and Persian forces into Europe). In December, Batu Khan sends envoys to the Rus' court of Grand Prince Yuri Igorevich and demands the submission of the capital Ryazan.source
• 1237Summer – Emperor Frederick II assembles an expeditionary force (some 15,000 men) to crush the rebellious Lombard League. He crosses the Alps to Verona – where he is joined by Lord Ezzelino III da Romano, including troops from Brescia, Vicenza, Padua and Treviso. Frederick relies on his allies for support and in doing so, he provokes the opposition of earlier supporters, such as the House of Este, which now sides with the Lombards.source
• 1237Spring – Al-Ashraf Musa, Ayyubid ruler of Damascus, assembles his allies and secures his active support of Kayqubad I, Sejuk ruler of the Sultanate of Rum. A civil war seems inevitable when Kayqubad is poisoned during a feast at Kayseri, on May 31. Meanwhile, the Seljuks strengthen the fortresses in the eastern provinces against the Mongols.source
• 1237Battle of Voronezh River: Grand Prince Yuri II of Vladimir supported by border princes of Ryazan, Murom, and Pronsk gathers his forces and make a stand on the Voronezh River, waiting for reinforcements from Vladimir. The Mongols under Batu Khan overrun the Rus' forces, who are scattered. Yuri retreats to Ryazan, while some troops withdraw to Kolomna and join the army of Vladimir-Suzdal.source
• 1238January 15–20 – Siege of Moscow: The Mongols under Batu Khan and Subutai campaign across the northern heartland of the Kievan Rus', committing numerous atrocities across multiple settlements, including the sacking of an insignificant town known as Moscow. According to the Chronicle of Novgorod, Moscow is a fortified village, a trading post "on a crossroads of four rivers". The village is taken by the Mongols after 5 days of siege.source
• 1238March – Siege of Kozelsk: The 12-year-old Prince Vasily of Chernigov (grandson of Mstislav II Svyatoslavich), manages against all the odds, to hold out in his capital of Kozelsk for nearly two months with only citizen militia. He leads a successful sortie outside of the walls – where the garrison slaughters thousands of Mongols and destroys siege equipment. Finally, Kozelsk is conquered and Vasily is slaughtered alongside the inhabitants.source
• 1238July 11 – Siege of Brescia: Emperor Frederick II begins the siege of Brescia. He rejects the negotiations of the Lombard League and insists on unconditional surrender to the imperial forces in northern Italy. This blocks all possibilities of a peaceful settlement. Milan and five other Lombard cities are attacked. In early October, after a successful sortie by the city's defenders, Frederick is forced to lift the siege.source
• 1238August 21 – Battle of Örlygsstaðir: Chieftain Sighvatr Sturluson and his son, Sturla Sighvatsson, are defeated by Kolbeinn ungi Arnórsson and Gissur Þorvaldsson, for control of Iceland (known as the Age of the Sturlungs).source
• 1238Autumn – The Mongols under Batu Khan retire, leaving behind the ruined northern Rus' territories. He spends the rest of the year suppressing the last resistance of the Kipchaks, while his cousin Möngke (son of Tolui Khan) conquer the Alans and the northern Caucasian tribes. Later, Möngke makes a raid of reconnaissance as far as Kiev.source
• 1239October 18 – Sack of Chernigov: The Mongols led by Batu Khan attack Chernigov; the garrison rallies outside the walls to face the Mongols in a pitched battle. Prince Mstislav III Glebovich comes to help with his troops but they are slaughtered by Mongol catapults. The city is pillaged as are the towns in the surrounding countryside.source
• 1239November 2 – An expeditionary force (some 4,000 knights) under Theobald I sets out from Acre for the Egyptian frontier, detachments from the military orders and several local barons accompany the Crusaders. While marching to Jaffa, a Crusader column led by Peter of Brittany and his lieutenant Raoul de Soissons with two hundred knights, lay an ambush and attacks a rich Muslim caravan.source
• 1239November 12 – Sultan as-Salih Ayyub sends an Ayyubid army to Gaza to protect the Egyptian border. At nightfall, Henry of Bar, jealous of the successful ambush of Peter of Brittany, decides to march out towards Gaza with a Crusader force (some 500 knights and 1,000 soldiers). Although warned by Theobald I, Henry sets up camp in a flat terrain surrounded by sand dunes near Gaza.source
• 1239November 13 – Battle of Gaza: The Crusader army led by Henry of Bar is defeated by the Egyptians near Gaza. More than a thousand men are slaughtered, including Henry himself. Six hundred more are captured and carried off to Egypt. Among them are Amaury VI de Montfort and Philippe de Nanteuil – who, in the dungeons of Cairo, writes a Crusade song about the failure of the expedition.source
• 1239December 7 – Ayyubid forces under An-Nasir Dawud march on Jerusalem, which is largely undefended. The garrison of the city surrenders to Dawud, after accepting his offer for a safe-conduct to Acre. Dawud destroys Jerusalem's fortifications, including the Tower of David. Meanwhile, Theobald I (losing many men underway) moves with the remnants of the Crusader army northward to Acre.source
• 1239The Mongol invasion of Kievan Rus': The Mongols under Batu Khan continue their campaign across the Pontic Steppe. After devastating the Crimea and campaigning against the Circassians in the Caucasus, they turn towards the Kievan Rus'. In March, Pereyaslavl, capital of the Principality of Pereyaslavl, is sacked by the Mongols.source
• 1239Summer – A German expeditionary force under Frederick II, Holy Roman Emperor, invades the Romagna and Tuscany, hoping to capture Rome. He appoints his 21-year-old son, Enzo of Sardinia, as imperial vicar general for Northern Italy. Frederick also threatens with war against Venice, which has sent ships to blockade the harbors on Sicily. In order to finance his growing need for arms, he institutes an administrative reorganization of the Holy Roman Empire (among others, the formation of 10 vice regencies in Italy).source
• 1240July 15 – Battle of the Neva: A Swedish army under Bishop Thomas sails up the Gulf of Finland in their longboats. They proceed into the Neva River with the aim of seizing control over Lake Ladoga and from there, striking at the city of Novgorod. Prince Alexander rallies his druzhina comparable to the 'household' of western European countries, and decisively routs the Swedish forces, saving the Novgorod Republic from a full-scale enemy invasion from the North. As a result, Alexander wins his first military victory at the age of 19 and receives the title of 'Nevsky'.source
• 1240August – Siege of Faenza: Frederick II lays siege to the town of Faenza during the war of the Guelphs and Ghibellines. Meanwhile, Frederick makes an alliance with Pisa to support his campaign against the Papal States.source
• 1240September – 1240 Izborsk and Pskov campaign: An alliance of the Livonian Order, the Bishopric of Dorpat and the pretender-prince Yaroslav Vladimirovich of Pskov besiege and conquer the border fortress of Izborsk in the Pskov Land. After Pskovian defenders fail to retake the town, the allied forces advance to the capital Pskov itself, compelling it to surrender, resulting in the brief overthrow of the pro-Suzdalian faction that supports prince Alexander Nevsky.source
• 12401240–1241 Votia campaign begins when an alliance of the Livonian Order, the Bishopric of Ösel–Wiek and Estonians Chud march into Votia.source
• 1240Summer – As-Salih Ayyub becomes ruler of Egypt, after deposing his half-brother Al-Adil II. Meanwhile, other members of the Ayyubid Dynasty are conspiring to depose him and replace him with his uncle, As-Salih Ismail. During his reign, As-Salih begins buying large numbers of Kipchak slaves, to form an elite core in the Egyptian army, known as Mamluks.source
• 1241March 18 – Battle of Chmielnik (Mongol invasion of Poland): The Mongols overwhelm the feudal Polish armies of Sandomierz and Kraków provinces, and plunder the abandoned city of Kraków.source
• 1241April 9 – Battle of Legnica: The Mongols, under the command of Baidar, Kadan and Orda Khan, defeat the feudal Polish nobility, including the Knights Templar.source
• 1241April 11 – Battle of Mohi: Batu Khan and Subutai defeat Béla IV of Hungary. The battle is the last major event in the Mongol Invasion of Europe.source
• 1241May 10 – Battle of Cameirge in Ulster: The Milesian Irish septs of the Ó Dónaills from Donegal, the Ó Néills from Armagh and the Ó Dochartaighs of Connacht defeat the last Tuatha Dé Danann sept, the Meic Lochlainn of Tír Eoghain and Inishowen under Domhnall mac Muirchertaigh Mac Lochlainn. From now on the Kings of Tír Eoghain will all be of the Ó Néill dynasty, Brian Ua Néill becoming sole ruler.source
• 1241May – Battle of Giglio: an Imperial fleet defeats a Genoan fleet in the Tyrrhenian Sea.source
• 1241August 29 – After Henry III of England's invasion of Wales, the Treaty of Gwerneigron is signed by him and Dafydd ap Llywelyn, curbing the latter's authority and denying him royal title.source
• 1241December – Siege of Lahore (1241): The Mongols under Tair Bahadur besiege and sack the city of Lahore in the Delhi Sultanate.source
• 1241Livonian Crusade: The Estonian rebellion of 1237 is suppressed on Saaremaa Island, by the Livonian Order.source
• 1242April 5 – Battle of Lake Peipus (or Battle on the Ice): Russian forces led by Alexander Nevsky, rebuff an invasion attempt by a Crusader army (some 2,600 men), including German Teutonic Knights. The opposing armies meet upon the frozen surface of Lake Peipus. The outnumbered Teutonic Knights are defeated on the slippery surface, by Alexander's elite druzhina and the Novgorod forces.source
• 1242May 28 – Avignonet massacre: A group of Cathars, with the probable connivance of Count Raymond VII of Toulouse, murder the inquisitor William Arnaud and eleven of his companions.source
• 1242July 21–22 – Battle of Taillebourg: French forces (some 25,000 men) under King Louis IX (the Saint) defeat King Henry III at the bridge over the Charente River near Taillebourg. After the battle, Louis continues to pursue the English troops, capturing many prisoners. Henry retreats with the remnants of his army to Bordeaux, where he spends the winter.source
• 1242Spring – Siege of Esztergom: The Mongols under Batu Khan assault and destroy most of the Hungarian city of Esztergom. Batu Khan sends a reconnaissance party against the Holy Roman Empire.source
• 1242Summer – Alexander Nevsky sends envoys to Batu Khan, preemptively capitulating before the Mongols even though they have not reached Novgorod, and accepts his rule as Mongol overlord.source
• 1242Summer – In the Maghreb, after a string of successes against the Almohad Caliphate, Hafsid forces under Sultan Abu Zakariya Yahya conquer the city of Tlemcen (modern Algeria). The Kingdom of Tlemcen becomes a vassal of Abu Zakariya, and is formed in a series of small states between his rule and the states of the Western Maghreb.source
• 1242Spring – Prince Alexander Nevsky is joined by his brother Andrey II (Yaroslavich) at Novgorod, supported with his elite druzhina (or 'household') from Suzdal. They head southwest across the frozen marshes, which cover much of the land between Novgorod and Pskov. On March 5, Alexander retakes the city almost without a struggle, before the larger Crusader garrison in nearby Izborsk can intervene.source
• 1242King Sancho II (the Pious) conquers the cities of Tavira, Alvor and Paderne, in his continuing expansion against the Muslims, known as the Reconquista.source
• 1242Spring – The Templar Knights raid the city of Hebron. Meanwhile, An-Nasir Dawud, Ayyubid ruler of Damascus, sends forces to cut off the road to Jerusalem, and to levy tolls on the pilgrims and merchants that pass by.source
• 1242Battle of Grobnik Field: Croatian forces under Béla IV stop the Mongol invasion in Hungary and Croatia. Béla rebuilds the country and orders the building of fortifications through his kingdom.source
• 1243May 1 – The Castillan troops are garrisoned in Murcia, to support the Hudid Dynasty.source
• 1243June 12 – A Crusader force under Balian III, lord of Beirut, captures Tyre after a long siege. The barons seize the citadel on July 10, with the help of Alice, queen of Cyprus, whose forces arrive on June 15. This ending the War of the Lombards.source
• 1243June 26 – Battle of Köse Dağ: The Mongols under Baiju Noyan defeat the Seljuk Turks of the Sultanate of Rum and their Byzantine allies. The Seljuks and the Empire of Trebizond become vassals of the Mongols.source
• 1243Siege of Montségur: French forces (some 10,000 men) begin the siege of Château de Montségur to raze the stronghold held by the rebellious Cathars. The castle is defended by some 100 troops and 500 refugees.source
• 1243Siege of Viterbo: Emperor Frederick II besieges Viterbo on request of the rebel citizens. The defenders are able to set fire to the siege towers and after signing a peace treaty, Frederick is persuaded to withdraw his army.source
• 1244March 16 – Siege of Montségur: French forces capture and destroy Château de Montségur in Languedoc, after a 9-month siege. Some 200 'heretics' (perfecti and credentes) are burnt in a bonfire, near the foot of the castle. This marks the final defeat of the Cathars (or Albigensians); the followers become scattered fugitives, meeting in forests and mountain wilds.source
• 1244June – Khwarazmian forces (some 10,000 men) invade Syrian territory, ravaging the land and burning the villages. As Damascus is too strong for a siege, they attack Galilee, past the town of Tiberias – which they capture. The Khwarazmians attack further southward through Nablus towards Jerusalem.source
• 1244July 15 – Siege of Jerusalem: Khwarazmian horsemen attack and sack the 'holy city' of Jerusalem. There is bloody fighting in the streets. The Khwarazmian force their way into the Armenian Quarter, where they decimate the Christian population, and drive out the Jews. The city is left in a state of ruin.source
• 1244August 23 – The Tower of David surrenders to the Khwarazmian forces. Some 6,000 Christian men, women and children march out of Jerusalem. As they move along the road toward Jaffa, they see crusader flags waving on the Walls of Jerusalem. Returning, some 2,000 of them are massacred.source
• 1244October 4 – The Crusaders assemble a force of some 1,000 cavalry and 6,000 men outside Acre, after hearing that Jerusalem is sacked by the Khwarazmians. They are joined by the Ayyubid forces (some 4,000 men) of Damascus and Homs – while Emir An-Nasir Dawud brings his army from Kerak.source
• 1244October 5 – Innocent IV flees to France and travels to Lyon, where he arrives on November 29. Although the city is nominally subject to the Holy Roman Empire, Innocent falls under the protection of Louis IX.source
• 1244October 17 – Battle of La Forbie: A Crusader army (some 10,000 men) under Walter IV of Brienne and Ayyubid allies are defeated near Hiribya (or La Forbie) by Egyptian and Khwarazmian forces. The army is destroyed, with about 7,500 men killed. Walter and William of Chastelneuf are captured.source
• 1245April – Egyptian forces under As-Salih Ayyub besiege the city of Damascus. After six months, As-Salih Ismail, ruler of Damascus, surrenders to Ayyub in return for a vassal-principality, consisting of Baalbek and the Hauran. Ayyub is awarded the title of sultan by Caliph Al-Musta'sim in Baghdad.source
• 1245Winter – Siege of Jaén: Castilian forces under King Ferdinand III ("the Saint") besiege the Moorish-held city of Jaén. During the siege Moorish knights sally out and manage to capture a Castilian supply caravan. Meanwhile, Ferdinand tries to launch attacks on the various city gates, but all are ineffective.source
• 1245In witness of the toll taken by war and fiscal pressure in the Kingdom of Castile, the region of Segovia is described this year as depopulated and sterile.source
• 1246February 28 – Siege of Jaén: Castilian forces, led by King Ferdinand III (the Saint), manage to take the city of Jaén from the Andalucians. In a combined assault with the knights of the Order of Santiago, the city is handed over by Sultan Muhammad I, who accepts Ferdinand's overlordship in exchange for a 20-year truce. The Emirate of Granada becomes a vassal state of the Kingdom of Castile.source
• 1246June 15 – Battle of the Leitha River: Hungarian forces, under King Béla IV, defeat Duke Frederick II (the Quarrelsome) at the banks of the Leitha River. Frederick is killed (leaving no male heirs); the House of Babenberg is dissolved. Emperor Frederick II places the fiefs of Austria and Styria under his rule. This ends the Austrian claims to the western counties of Hungary.source
• 12462 October – Damascus falls to the Ayyubid vizier Mu'in al-Din Hasan ibn al-Shaykh after a siege of some four months.source
• 1246November – Michael II Asen, ruler (tsar) of the Bulgarian Empire, succeeds his brother Kaliman I (possibly poisoned). He confirms the reconquest of Bulgarian territories against John III (Doukas Vatatzes), Byzantine ruler of the Empire of Nicaea.source
• 1246Frederick II suppresses a Sicilian revolt and deports the remaining Muslim inhabitants of Lucera (approximate date).source
• 1247June 17 – Egyptian forces under Sultan As-Salih Ayyub capture Tiberias and his castle. Mount Tabor and Belvoir Castle are occupied soon afterward. Next, Ayyub moves his army to siege Ascalon – which is defended by a garrison of Knights Hospitaller. They summon the help from Acre and Cyprus.source
• 1247October 15 – Egyptian forces under As-Salih Ayyub capture Ascalon by surprise – while a battering-ram forces a passageway under the walls right into the citadel. Most of the defenders are massacred, and the remainder of the garrison is taken prisoner.source
• 1247December 1 – A rebellion arises among the Muslim subjects in the region of Valencia. As a punishment, King James I of Aragon ("the Conqueror"), issues an order of expulsion of the Muslims from his realm, leading numerous people into exile in Andalusia and North Africa.source
• 1247Battle of Ballyshannon: Norman forces under Maurice FitzGerald defeat a Gaelic army near Ballyshannon in northern Ireland. After the battle, the entire country of Donegal is devastated and plundered by the Normans.source
• 1247The Hōjō clan under Hōjō Tokiyori destroys the Miura family; and in doing so, the clan consolidates its authority as regents in Japan.source
• 1247Summer – Siege of Seville: Castilian forces under King Ferdinand III ("the Saint") begin to besiege Seville, the city is isolated and Ramón de Bonifaz sails with 13 galleys up the Guadalquivir River to scatter some 40 smaller Almohad ships trying to oppose him (with many destroyed).source
• 1248February 18 – Battle of Parma: Imperial forces (some 6,000 men) under Emperor Frederick II are defeated by the Lombard League at Parma. Much of Frederick's treasure is lost, while he is hunting in the Taro Valley.source
• 1248September 17 – Louis IX arrives at Limassol on the island of Cyprus. He gathers his forces and is well received by King Henry I of Cyprus ("the Fat"). The Crusaders are supplemented by nobles from Acre, including Grand Masters Jean de Ronay and Guillaume de Sonnac. Louis prepares a plan of campaign, with Egypt as the prime objective.source
• 1248November 23 – Reconquista: Siege of Seville: Castilian forces under King Ferdinand III of Castile ("the Saint") recapture the city of Seville from the Almohads, after a 16-month siege. Prince Alfonso X of Castile takes the city of Alicante.source
• 1248December – Louis IX decides to spend the winter on Cyprus to make preparations against Egypt. Meanwhile, the nobles persuade him to start negotiations with Sultan As-Salih Ayyub to intervene in the internal Ayyubid affairs. But Louis rejects this offer and orders the Knights Templar to break off their negotiations with As-Salih.source
• 1248December – William of Villehardouin, Latin ruler of the Principality of Achaea, captures Monemvasia – last remaining Byzantine outpost on the Peloponnese.source
• 1249March – The Japanese Hōji period ends during the reign of Emperor Go-Fukakusa and the Kenchō period begins (until 1256).source
• 1249May 26 – Battle of Fossalta: King Enzo of Sardinia, an illegitimate son of Emperor Frederick II, is captured and imprisoned by Lombard forces, in a clash between the Guelphs and Ghibellines. Enzo is put in golden chains and paraded around Bologna on a horse. He becomes a prisoner in a palace, named Palazzo Re Enzo.source
• 1249May – Nicaean–Latin Wars: Latin forces led by William of Villehardouin, arrive on the island of Rhodes on their way to join the Seventh Crusade. This causes the Nicaeans to raise the siege of Rhodes. William concludes an agreement with the Genoese and leaves behind some 100 knights before departing for the Holy Land.source
• 1249June 5 – Siege of Damietta: Louis IX lands with a Crusader force and captures Damietta, after a fierce battle at the edge of the sea. The onslaught of the knights of France and those of Outremer under John of Ibelin, force the Ayyubids back with heavy losses. At nightfall, Fakhr ad-Din withdraws his army over a bridge of boats to Damietta. Finding the population there in panic and the garrison wavering, Fakhr ad-Din decides to evacuate the city. On June 6, Louis marches triumphantly over the bridge into Damietta and builds a camp to attack Cairo.source
• 1249August 15 – First Battle of Athenry: Gaelic forces of Connacht besiege Athenry Castle in County Galway in Ireland, but are repelled by the Normans under Jordan de Exeter, Sheriff of Connacht.source
• 1249The city of Stralsund is burned to the ground, by German forces from the rival Free City of Lübeck. Later, the town is rebuilt with a massive defensive wall having 11 city gates and some 30 watchtowers.source
• 1250April 8 – Battle of Fariskur: Louis IX (the Saint) is captured by Baibars' Egyptian Mamluk army while he is in Egypt conducting the Seventh Crusade; he later has to ransom himself.source
• 1250July 9 – The Qaymariyya tribe engineers a coup d'état to hand over Damascus to An-Nasir Yusuf. The garrison in the citadel surrenders later to him.source
• 1250In Tunis, a popular rebellion against newly arrived, wealthy and influential Andalusian refugees breaks out, and is violently put down.source
• 1250Medieval music: The Notre Dame school of polyphony ends.source
• 1251April – The first Shepherds' Crusade, a domestic French uprising in response to events in Egypt during the Seventh Crusade, occurs.source
• 1251May – English governor Simon de Montfort suppresses a revolt in Gascony.source
• 1251Andrew de Longjumeau, dispatched two years earlier by King Louis IX of France as an ambassador to the Mongols, meets the king in Palestine, with reports from the Mongols and Tartary; his mission is considered a failure.source
• 1251King Conrad IV of Germany invades Italy, but fails to subdue the supporters of Pope Innocent IV.source
• 1252April 6 – Saint Peter of Verona is assassinated by Carino of Balsamo.source
• 1252Mongol conquest of the Song dynasty: the Mongols take the westernmost province of the Song dynasty empire.source
• 1252The Chinese era Chunyou ends (→ Emperor Lizong).source
• 1253April – An-Nasir Yusuf, Ayyubid ruler of Damascus, cedes Palestine, together with Jerusalem, Nablus and the coastline of Al-Sham to Aybak, Mamluk sultan of Egypt.source
• 1253August 6 – King Henry III leads an expedition to Gascony, to repel a rumoured invasion from Castile. Meanwhile, Simon de Montfort returns from Gascony where he allies himself with the barons who oppose Henry.source
• 1253October 10 – German imperial forces under King Conrad IV suppress the Sicilian rebellion and recapture Naples.source
• 1253Mongol forces under Hulagu Khan begin a campaign against the Nizari Ismaili State. An advance guard (12,000 men) under Kitbuqa captures several fortresses in Quhistan.source
• 1254June 12 – The Dutch city of Alkmaar obtains city rights from William II, anti-king of Germany.source
• 1254William II, anti-king of Germany, holds a diet (princely convention) at Worms, in which the German cities are represented for the first time. He gives orders to build strong castles in Heemskerk and Haarlem.source
• 1254As part of an offensive against usury in north-western Europe, Innocent IV relieves the city of Beauvais from its obligations to its creditors.source
• 1254Battle of Adrianople: Byzantine forces under Emperor Theodore II Laskaris defeat the invading Bulgarians near Edirne (Adrianople). The young and inexperienced Tsar Michael II Asen is caught by surprise and the Bulgarians suffer heavy losses. Michael is wounded during his hasty retreat through the forest.source
• 1255February 25 – Battle of Montebruno: Guelph forces under Thomas II of Savoy invade the Ghibelline territory of Asti (located in the Piedmont region), but he is defeated by the Astigiani army, led by William VII, at Garzigliana (Northern Italy). Thomas retreats and takes refuge in Turin; however, he is later captured by the Ghibellines.source
• 1255May – William of Rubruck from Constantinople returns to Cyprus from his missionary journey to convert the Mongols of central and eastern Asia; his efforts have been unsuccessful.source
• 1255June – Battle of Bryn Derwin: Llywelyn ap Gruffudd defeats his two brothers Dafydd ap Gruffydd and Owain Goch ap Gruffydd, to become sole ruler of northern Wales. Dafydd and Owain are both imprisoned.source
• 1255Emperor Theodore II Laskaris, who is in exile in the Empire of Nicaea, conducts a military campaign to recover Thrace from the Bulgarians.source
• 1256November 8–23 – Siege of Maymun-Diz: Mongol forces under Hulagu Khan successfully besiege the mountain castle of Maymun-Diz. Hulagu encircles the fortress and begins a bombardment for three days by mangonels from a nearby hilltop. On November 19, Nizari Isma'ili imam Rukn al-Din Khurshah surrenders, but a small part of the garrison refuses and fights a last stand, until they are killed after three days.source
• 1256December 15 – Mongol forces under Hulagu Khan capture and dismantle Alamut Castle (near the Masoudabad region) after the surrender of the Nizari Ismaili leaders. Hulagu founds the Ilkhanate dynasty of Persia, which becomes one of the four main divisions of the Mongol Empire. The Nizari Ismaili government is disestablished; some of them migrate to Afghanistan, Badakhshan and Sindh (modern Pakistan).source
• 1256War of the Euboeote Succession: Achaean forces under William II of Villehardouin attempt to gain control of the island of Euboea, which is resisted by the local Lombard barons (or "triarchs") with the aid of the Republic of Venice. William launches devastating raids in Euboea. Guy I de la Roche, the "Great Lord" of Athens and Thebes, enters the war against William, along with other barons of Central Greece.source
• 1256Prince Llywelyn ap Gruffudd invades the northern coastal areas of Wales that agreed to English rule in 1254. The Lord Edward, who has been given the areas to govern himself by his father, King Henry III of England, asks him for support but Henry refuses.source
• 1257March – The Japanese Kōgen era ends and the Shōka begins during the reign of the 14-year-old Emperor Go-Fukakusa (until 1259).source
• 1257June 5 – The city of Kraków is granted Magdeburg rights by High Duke Bolesław V the Chaste, having been rebuilt after being nearly destroyed during the First Mongol invasion of Poland (but Second invasion comes in 1259).source
• 1257Spring – Mongol forces under Uriyangkhadai conduct a campaign against local Yi and Lolo tribes in Vietnam. He returns to Gansu and sends messengers to the court of Möngke Khan informing him that Yunnan is firmly under Mongolian control. Möngke Khan honors and rewards Uriyangkhadai for his military achievements.source
• 1257Battle of Cadfan: An English expeditionary army under Stephen Bauzan is ambushed and defeated by Welsh forces. The English are decimated by devastating guerilla attacks and the Welsh capture the English supply train. Stephen Bauzan is killed along with some 1,000–3,000 of his men. The remaining English flee the battle, Prince Llywelyn ap Gruffudd is said to have been present at the battle, collecting spoils from the fallen English army. According to sources, it is one of the greatest victories of a Welsh army in the field against a much more powerful English force.source
• 1257King Henry III of England relents to the demands of his son The Lord Edward for assistance to fight the Welsh, originally made in 1256). He joins him on a campaign to retake the territories lost to the Welsh forces led by Llywelyn ap Gruffudd.source
• 1257Venetian–Genoese Wars: The Venetian fleet under Admiral Lorenzo Tiepolo breaks through the harbour chain at Acre and destroys several Genoese ships. He also attacks the fortifications but Tiepolo is unable to expel the Genoese garrison (some 800 men strong and armed with 50–60 ballistae), from their quarter of the city throwing up a blockade.source
• 1257Battle of Creadran Cille: Norman invading forces under Maurice FitzGerald are driven out by Gofraid O'Donnell in northern Connacht (Ireland). On May 20, FitzGerald is killed in personal combat by O'Donnell.source
• 1257Winter – Mongol forces move down from their base at Hamadan, while Baiju Noyan crosses the river Tigris at Mosul with his army. On the left-wing Kitbuqa enters the plain of Iraq, while Mongol forces under Hulagu Khan advance through Kermanshah.source
• 1257Spring – The Epirote–Nicaean conflict (1257–59) begins between the Despotate of Epirus and the Empire of Nicaea. Despot Michael II Komnenos Doukas revolts and defeats the Nicaean army under George Akropolites. The Epirote and Serbian forces join their attacks against Michael, who sends his forces into Macedonia and marches on to Thessalonica. In response, Michael is attacked – on the west coast of Epirus – by Manfred of Sicily. Manfred first occupies the major Ionian Islands, including Corfu. Then he lands on the Albanian coast and takes Durazzo, Berat, Valona and their environs.source
• 1258June 25 – Battle of Acre: The Genoese send an armada (some 50 galleys) to relieve the blockade at Acre and ask for the assistance of Philip of Montfort, lord of Tyre, and the Knights Hospitaller for a combined attack from the land side. The Genoese fleet's arrival takes the Venetians by surprise but the superior experience and seamanship result in a crushing Venetian victory, with half the Genoese ships lost. Later, the Genoese garrison is forced to abandon Acre.source
• 1258June – War of the Euboeote Succession: Achaean forces under William II Villehardouin defeat a coalition of Greek princes led by Guy I de la Roche ("Great Lord"), duke of Athens, which ends the conflict, on August 6.source
• 1258August 25 – George Mouzalon is assassinated in Magnesia ad Sipylum, as part of a conspiracy led by Byzantine nobles, under future Emperor Michael VIII Palaiologos.source
• 1258Civil unrest in northern Italy spawns the medieval musical form of Geisslerlieder, penitential songs sung by wandering bands of Flagellants.source
• 1258Mongol invasions of Vietnam: Mongol forces (some 30,000 men) under Uriyangkhadai, son of Subutai, invade Vietnam. After many battles, the Vietnam army is routed and defeated. The senior leaders are able to escape on prepared boats, while the remnants are destroyed on the banks of the Red River. The Mongols occupy the capital city, Thăng Long (modern-day Hanoi), and massacres the city's inhabitants, by the end of January.source
• 1259March – The Japanese Shōka era ends, and the Shōgen era begins (till April 1260).source
• 1259September – Epirote–Nicaean conflict, Battle of Pelagonia: The Empire of Nicaea defeats the Principality of Achaea, ensuring the eventual reconquest of Constantinople in 1261.source
• 1259The Goryeo Kingdom in Korea surrenders to invading Mongol forces.source
• 1259Nogai Khan leads the second Mongol Golden Horde attack against Lithuania, and Poland.source
• 1260April – The Japanese Shōgen era ends, and the Bun'ō era begins (to February 1261).source
• 1260May 21 – Kublai sends his envoy Hao Jing to negotiate with Song dynasty Chancellor Jia Sidao, after the small force left by Kublai south of the Yangtze River is destroyed, by a Chinese army of the Southern Song dynasty. Chancellor Jia Sidao imprisons the entire embassy of Kublai. This slight will not be forgotten by Kublai, but he is unable to assault the Song, due to the civil war with his rival brother Ariq Böke.source
• 1260July 12 – Battle of Kressenbrunn: King Ottokar II of Bohemia captures Styria from King Béla IV of Hungary.source
• 1260July 13 – Livonian Crusade: The Baltic Samogitians and Curonians of the Grand Duchy of Lithuania decisively defeat the Livonian Order in the Battle of Durbe. This leads the Estonians of Saaremaa Island to once again rebel against the Livonian Order.source
• 1260September 3 – Battle of Ain Jalut in Galilee: The Egyptians defeat the Mongols, marking their first decisive defeat, and the point of maximum expansion of the Mongol Empire. Isa ibn Muhanna is appointed amir al-ʿarab under the Egyptian Mamluk Sultanate.source
• 1260September 4 – Battle of Montaperti: The Sienese Ghibellines, supported by the forces of King Manfred of Sicily, defeat the Florentine Guelphs.source
• 1260September 20 – Second of the two major Prussian uprisings by the Old Prussian tribe of Balts against the Teutonic Order begins.source
• 1260October 24 – Saif ad-Din Qutuz, Mamluk sultan of Egypt, is assassinated by Baibars, who seizes power for himself.source
• 1260The Toluid Civil War begins between Kublai Khan and Ariq Böke, for the title of Great Khan.source
• 1260War breaks out in the Valais (in modern-day Switzerland), as the Bishopry of Sion defends against an invasion by the County of Savoy.source
• 1260The Chinese era Jingding begins and ends in 1264 in the Southern Song dynasty of China (last era of Emperor Lizong).source
• 1261February – The Japanese Bun'ō era ends and the Kōchō era begins during the reign of the 11-year-old Emperor Kameyama (until 1264).source
• 1261June 13 – Al-Mustansir II becomes the first Abbasid ruler in Cairo (after his escape during the Siege of Baghdad). He is sent with an army by Sultan Baibars to recover Baghdad, but is killed in a Mongol ambush near Anbar (modern Iraq), on November 28. The Abbasid caliphs continue as religious figureheads for the Mamluks in Egypt until the 16th century.source
• 1261July – Michael sends his general Alexios Strategopoulos with a small advance force of 800 soldiers, most of them Cumans, to keep watch on the Bulgarians and scout the defending positions of the Latin forces in the surroundings of Constantinople. When they reach the village of Selymbria, Strategopoulos is informed by local farmers that the entire Latin garrison and the Venetian fleet, are absent conducting a raid against the Nicaean island of Daphnousia. He decides not to lose such a golden opportunity and makes plans (without the consent of Michael) to retake the capital.source
• 1261August – Battle of Callann in Ireland: Norman forces under John FitzThomas are defeated by a Gaelic army led by King Fínghin Mac Carthaigh. John FitzGerald is killed during the fighting.source
• 1262March 8 – Battle of Hausbergen: The bourgeois of Strasbourg defeat a German army of knights (some 5,000 men) under Bishop Walter of Geroldseck. Strasbourg becomes an imperial Free City of the Holy Roman Empire.source
• 1262May – King Alfonso X ("the Wise") of Castile and León, at a meeting in Jaén, demands military support from Muhammad I, ruler of Granada, and relinquishes the ports of Tarifa and Algeciras to prepare an invasion of North Africa.source
• 1262King Mangrai of Lan Na (modern Northern Thailand) founds the city of Chiang Rai as the kingdom's capital.source
• 1262Berke–Hulagu war: Mongol forces under Berke Khan, ruler of the Golden Horde, raid territory in the Caucasus belonging to his cousin Hulagu Khan, ruler of the Ilkhanate. Berke supports the Georgian rebels and allies with the Mamluks. He defeats the Ilkhanate forces on the Terek River, together with the Mamluk army led by Baibars (or Abu al-Futuh), saving Palestine and Arabia from Ilkhanate occupation.source
• 1263April 4 – Egyptian forces led by Sultan Baibars (or Abu al-Futuh) attack Acre; there is severe fighting outside the walls, in which the seneschal, Geoffrey of Sergines, is badly wounded. Baibars is not yet ready to besiege the city and begins a major campaign to eliminate the Crusader kingdom of Jerusalem, the county of Tripoli and the principality of Antioch.source
• 1263July 16 – Rebels occupy London.source
• 1263September 12 – Mindaugas (or Mendog), the only Christian king of Lithuania, is assassinated by his cousin Treniota. The country reverts to paganism and loses its status as a kingdom. Treniota usurps the throne (until 1264).source
• 1263December – Magnus VI ("the Law-mender") succeeds his father Haakon IV as King of Norway. The chieftains of the eastern part of Iceland become the last to pledge fealty to Magnus, bringing a more complete end to the Icelandic Commonwealth and the Age of the Sturlungs.source
• 1263Before July – Battle of Settepozzi: A Byzantine-Genoese fleet (some 50 galleys) is routed by the Venetians near Spetses in the Argolic Gulf, who capture four ships and inflict considerable casualties. Later, the Genoese that survive the battle managed to capture Chania on Crete. They receive orders to avoid direct confrontations with the Venetian fleet, but instead are engaged in raiding against the Venetian merchant convoys in the Euripus Strait.source
• 1263Baronial forces led by Robert de Ferrers and Henry de Montfort lay siege to Worcester. The attackers finally enter the city and are allowed to sack it. They kill most of the Jewish community as part of the targeting of Jews during the conflict with the Barons by allies of de Montfort.source
• 1263Winter – Reconquista: King Alfonso X of Castile ("the Wise") conquers Niebla from the Moors, terminating any Muslim presence in the western region of Spain.source
• 1263Summer – Emperor Michael VIII Palaiologos sends a Byzantine expeditionary force (some 3,500 men) led by his half-brother, Constantine Palaiologos, to the Peloponnese in southern Greece. The army is transported to Monemvasia on Genoese ships, while a small Byzantine fleet is sent to harass the Latin island holdings in Euboea and the Cyclades. After arriving at Monemvasia, Constantine lays siege to Sparta, while the Byzantine fleet seizes the southern coast of Laconia.source
• 1263Battle of Prinitza: Constantine Palaiologos marches the Byzantine army up the rivers Eurotas and Alfeios towards the Achaean capital, Andravida. At a narrow pass at Prinitza (near Ancient Olympia) in Elis, the Byzantines are attacked by Achaean forces (some 300 horsemen) under John of Katavas, who inflict a resounding defeat upon them; many Byzantine soldiers are killed. Constantine himself barely escapes with his life, and flees with the remainder of his army to the safety of Mystras.source
• 1264January 23 – King Louis IX of France ("the Saint") issues the Mise of Amiens, a settlement between King Henry III of England and his rebellious barons under Simon de Montfort, heavily favouring the former – which leads to the Second Barons' War. At Amiens, Henry accuses the barons of destroying his castles and laying waste to royal lands. For this he demands a compensation of some £300,000 and 200,000 marks, which is defended by Louis.source
• 1264February – The Japanese era Kōchō ends and the Bun'ei era begins during the reign of the 14-year-old Emperor Kameyama (until 1275).source
• 1264April – Gilbert de Clare leads a massacre of the Jews at Canterbury, during the outbreak of the Second Barons' War. In the meantime, another of de Montfort's followers, John FitzJohn, leads a massacre against the Jews in London. The Jewish communities of Northampton, Winchester, Cambridge, and Lincoln are looted. The archæ (official chest of records) is destroyed or deposited at the headquarters of de Montfort's supporters at Ely.source
• 1264May 14 – Battle of Lewes: English rebels led by Simon de Montfort defeat Henry III and Prince Edward ("the Lord Edward"), at Lewes. Henry leaves the safety of Lewes Castle and St. Pancras Priory, to engage the rebels. Edward routes part of the rebel army (some 5,000 men) with a cavalry charge, but during the battle de Montfort's forces capture both Henry and Edward, making Simon the "uncrowned king of England" for 15 months.source
• 1264June – The Lord Edward is held captive at Wallingford Castle, but after an escape attempt he is moved to Kenilworth Castle.source
• 1264June – Simon de Montfort summons Parliament in London to confirm new constitutional arrangements. Two knights are summoned for each county, and are allowed to comment on general matters of state – the first time this has occurred. In France, Queen Eleanor of Provence, wife of Henry III, makes plans for an invasion of England with the support of Louis IX OF France.source
• 1264August 8 – Mudéjar Revolt: Muslim rebel forces, aided by allies from Algeciras and Tarifa, take the town of Jerez de la Frontera after defeating the outnumbered Castilian garrison led by Nuño González de Lara ("the Good"). The rebels are supported by Muhammad I, ruler of the Emirate of Granada, while King Alfonso X of Castile ("the Wise") is allied with Aragon. The rebels manage to capture Murcia, as well as several smaller towns.source
• 1264August 14 – Battle of Saseno: The Genoese fleet (16 galleys) manages to trick and capture an entire Venetian trade convoy near Saseno Island off the coast of Albania. The captured merchandise and ships are valued at more than 100,000 Genoese pounds, an enormous sum for the period, of which 30,000 goes into the Genoese treasury through the sale of the plunder.source
• 1264October 9 – Reconquista: Castilian forces under Alfonso X counter-attack and recapture Jerez de la Frontera after a siege. The rebel-held towns of Vejer de la Frontera, Rota, and Sanlúcar de Barrameda also fall to Alfonso. Muslims in the retaken towns are expelled and the mosques in Jerez are converted to churches. The region is settled by Christians from elsewhere.source
• 1264December 10 – Hungarian Civil War, a dynastic conflict, erupts between King Béla IV and his son, Duke Stephen. Hungarian forces under Ladislaus II Kán invades Stephen's realm and push forward unhindered penetrating the valley of the Mureș River in the southern part of Transylvania. Stephen's army halts Ladislaus' advance at the Fortress of Deva (modern Romania).source
• 1264The Toluid Civil War ends: Kublai Khan defeats his brother and pretender to the title of "Great Khan", Ariq Böke, who surrenders to Kublai on August 24. He is imprisoned and with the Chinese support behind him, Kublai is acknowledged by the rulers of the western khanates and as sole ruler of the Mongol Empire. He moves his capital from Shangdu in Inner Mongolia, to the Chinese city of Dadu (modern-day Beijing).source
• 1264Winter – The War of the Thuringian Succession ends after 17 years with the state of Hesse gaining its independence from Thuringia and becoming the Landgraviate of Hesse, a principality of the Holy Roman Empire.source
• 1265March – End of the Hungarian Civil War (1264–1265) – Battle of Isaszeg: Younger King Stephen decisively defeats his father's army.source
• 1265May 28 – Future King Edward I of England escapes the captivity of Simon de Montfort, 6th Earl of Leicester.source
• 1265Mongol armies, led by Nogai Khan, raid Thrace.source
• 1265In the first major battle in five years (since the Song dynasty Chinese pushed the forces of Kublai Khan back across the Yangzi River, after Möngke Khan's failed invasion in 1259), Kublai Khan engages the Chinese in Sichuan province. Kublai gains a preliminary victory, and war booty of 146 captured Song dynasty naval ships.source
• 1265The Mamluk Sultanate Bahri dynasty of Egypt captures several cities and towns from Crusader states in the Middle East, including the cities of Haifa, Arsuf, and Caesarea Maritima; these events eventually precipitate the Eighth Crusade in 1267.source
• 1266May 15 – Second Barons' War: Battle of Chesterfield: English forces led by Henry of Almain, son of Richard of Cornwall, defeat rebels under Robert de Ferrers in a minor skirmish at Chesterfield. Robert is taken as a prisoner to London, and at the Parliament of England disinherits. In July, he is forced to surrender land and Liverpool Castle to Edmund Crouchback, second son of King Henry III of England.source
• 1266June 23 – Battle of Trapani: The Venetian fleet (24 galleys) led by Admiral Jacopo Dondulo moves to Marsala and attacks the larger Genoese fleet anchored at Trapani, capturing all its ships. Some 1,200 Genoese drown and many are killed. Dondulo is acclaimed a hero on his return to Venice in July and elected as Captain General of the Sea, Venice's highest naval command position.source
• 1266June – The Mudéjar revolt of 1264–1266 ends. The rebels make their formal submission to Alfonso X. They recognize the error that the Moors of Murcia have committed against their overlord Alfonso. Representatives of the aljama, or municipal council, renew their allegiance and humbly beg for pardon, mercy and favour. With this, the Mudéjar uprising in the Kingdom of Murcia is formally ended.source
• 1266July 23 – Siege of Safed: Mamluk forces capture the castle of Safed, defended by a garrison of 1,700 men (including some 500 Knights Templar), after a 6-week siege. Sultan Baibars promises safe conduct but when the Christians and Templars are on their way towards Acre, they are seized and beheaded.source
• 1266August 24 – Battle of Mari: Mamluk forces (some 30,000 men) led by Baibars defeat the Armenian army in Cilicia, in retaliation for the support of the Mongol invasion in Syria. He expands his domain, capturing the city of Byblos (modern Lebanon) and the important castle of Toron from the Crusader States.source
• 1266October 28 – A Crusader advance guard is ambushed by the Egyptian garrison of Safed, while local Arabs attack the Crusader camp. The 13-year-old Hugh II, ruler of Cyprus, is advised to retire and withdraw with heavy losses. Meanwhile, Baibars campaigns in Galilee and leads a lightning raid to Tripoli.source
• 1266December 13 – Siege of Kenilworth: English forces under Henry III capture Kenilworth Castle from remaining rebels in the Second Barons' War after a 6-month siege. During the siege Archbishop William Freney tries to negotiate with the garrison but is refused entry.source
• 1267Spain attempts an invasion of Morocco, but the Muslim empire Marinid Sultanate successfully defend against the invasion, and drive out Spanish forces.source
• 1267by Summer – The Second Barons' War in England ends as the rebels and King Henry III of England accept the peace terms laid out in the Dictum of Kenilworth (1266).source
• 1268February 18 – Battle of Rakvere: The Livonian Order is defeated by Dovmont of Pskov.source
• 1268May 18 – Battle of Antioch: The Principality of Antioch, a crusader state, falls to the Mamluk Sultan Baibars; his destruction of the city of Antioch is so great, as to permanently negate the city's importance.source
• 1268August 23 – Battle of Tagliacozzo: The army of Charles of Anjou defeats the Ghibellines supporters of Conradin of Hohenstaufen, marking the fall of the Hohenstaufen Family from the Imperial and Sicilian thrones, and leading to the new chapter of Angevin domination in Southern Italy.source
• 1268King Stephen V of Hungary launches a war against Bulgaria.source
• 1268Kublai Khan sends an emissary to the Kamakura shogunate of Japan, demanding an acknowledgment of suzerainty and payment of tribute; the Japanese refuse, starting a diplomatic back-and-forth, lasting until the Mongols attempt to invade in 1274.source
• 1268The Battle of Xiangyang, a 6-year battle between the Chinese Song dynasty and the Mongol forces of Kublai Khan, begins in what is today Hubei.source
• 1269June 16 – Battle of Colle Val d'Elsa: Guelph forces (2,200 men) led by King Charles I of Anjou defeat the Ghibellines at Tuscany. After the battle, the Guelphs drive out their adversaries at Colle di Val d'Elsa, destroying their houses, and confiscating their possessions.source
• 1269September 8 – Berber forces of the Marinid Sultanate under Abu Yusuf Yaqub ibn Abd al-Haqq complete the conquest of Morocco and capture Marrakesh after a long siege, effectively ending the Almohad Caliphate. The last Almohad ruler, Idris al-Wathiq (or Abu Dabbus), is assassinated by a slave. The Marinids become the new masters of the western Maghreb and Abu Yusuf Yaqub takes up the title of "Prince of the Muslims".source
• 1269Prince Edward (the Lord Edward) of England obtains the right to levy a twentieth of the value of the Church's wealth to finance the Ninth Crusade. That sum turns out to be insufficient, and Edward has to borrow to reach his target.source
• 1270February 16 – Livonian Crusade - Battle of Karuse: The Grand Duchy of Lithuania defeats the Livonian Order decisively, on the frozen surface of the Baltic Sea.source
• 1270October 30 – The siege of Tunis and the Eighth Crusade end, through an agreement between Charles I of Sicily (Louis IX's brother) and Muhammad I al-Mustansir, Khalif of Tunis.source
• 1270December 15 – The Nizari Ismaili garrison of Gerdkuh, Persia surrender after 17 years to the Mongols.source
• 1270The ancient city of Ascalon is captured from the Crusader States, and utterly destroyed by the Mamluk sultan Baibars, who goes so far as to fill in its important harbor, leaving the site desolate, and the city never to be rebuilt.source
• 1270The city of Tabriz, in present-day Iran, is made capital of the Mongol Ilkhanate Empire (approximate date).source
• 1270Before August – King Louis IX of France launches the Eighth Crusade, in an attempt to recapture the Crusader States from the Mamluk sultan Baibars; the opening engagement is a siege of Tunis.source
• 1270In Korea, the Sambyeolcho Rebellion begins against the Goryeo dynasty, a vassal state of the Yuan dynasty.source
• 1271February – Mamluk forces led by Sultan Baibars continue their territorial expansion in western Syria and appear before Safita Castle (called the White Castle) built by the Knights Templar. After a heroic defense, the small garrison is advised by Grand Master Thomas Bérard to surrender. The survivors are allowed to withdraw to Tortosa.source
• 1271April 8 – Siege of Krak des Chevaliers: Mamluk forces under Baibars capture the strategically important castle Krak des Chevaliers from the Knights Hospitaller. During the siege the defenders receive a letter, supposedly from Grand Master Hugues de Revel, to surrender the castle. Under safe-conduct the Hospitallers retreat to Tripoli.source
• 1271May 9 – English prince the Lord Edward and King Charles I of Anjou arrive in Acre, with a fleet of 30 galleys, starting Lord Edward's crusade (the Ninth) against Baibars. During this crusade they are unable to capture any territory and peace is quickly negotiated with the Mamluk Sultanate. Baibars consolidates his occupation in Syria.source
• 1271May–June – Baibars conducts an unsuccessful siege of Tripoli, and also fails in an attempted naval invasion of Cyprus. He sends an Egyptian fleet (some 20 ships) to Limassol, while King Hugh III of Cyprus ("the Great") has left for Acre. Due to bad weather and seamanship, 11 ships run aground and the crews fall into the hands of the Cypriots.source
• 1271July 2 – Peace of Pressburg: Kings Ottokar II and Stephen V sign a peace agreement at Pressburg, settling territorial claims, following the failed invasion of Hungary by Ottokar in April. In the agreement, Stephen promises not to support Ottokar's opponents in Carinthia, and Ottokar renounces the castles he and his partisans occupy in Hungary.source
• 1271October – Abaqa Khan, Mongol ruler of the Ilkhanate, detaches some 10,000 horsemen from Anatolia to support the Lord Edward in his war against Baibars. They invade Syria and defeat Mamluk forces who protect the region around Aleppo. The Mongols plunder the cities of Maarat al-Numan and Apamea.source
• 1271The Nakhi Kingdom, of the northern Himalayan foothills, is annexed by the Yuan dynasty (approximate date).source
• 1272February – Charles I of Anjou, king of Sicily, occupies the city of Durrës, and establishes the Angevin Kingdom of Albania. A delegation of Albanian nobles and citizens from Durrës make their way to Charles' court.source
• 1272June 16 – The Lord Edward, heir to the English throne, prevents an assassination attempt on himself at Acre. A Syrian Nizari (or Assassin) supposedly sent by Baibars penetrates into the prince's chamber and stabs him with a poisoned dagger. The wound is not fatal, but Edward is seriously ill for some months. Baibars hastens to dissociate himself from the deed by sending his congratulations on the prince's escape.source
• 1272June – Marinid forces land in Spain and ravage the countryside. They kill and capture many and plunder livestock. They also attack the castle of Vejer de la Frontera in Andalusia. On hearing the news, King Alfonso X of Castile ("the Wise") abandons his meeting with Sultan Muhammad I of Granada and orders an all-out war against Granada.source
• 1272August 18 – Nubian forces sack the Egyptian Red Sea outpost of Aydhab and raid the southern frontier city of Aswan. In return, Baibars invades the kingdom of Makuria.source
• 1272August 20 – Battle of Heiloo: Floris V, count of Holland, makes an unsuccessful attack on Frisia in an attempt to recover the body of his father, William II, who was killed (16 years ago) by the Frisians near Hoogwoud (modern Netherlands).source
• 1273March 14 – Battle of Xiangyang: Chinese forces surrender to Kublai Khan's general Aju (or Achu) after a 6-year siege. The battle is the first in which firearms are used in combat.source
• 1273July – Mamluk forces under Baibars capture the last remaining stronghold of the Order of Assassins (Hashashin) sect, Al-Kahf Castle.source
• 1273August – Mongol forces surround the castle of Al-Bira. Baibars skirts around the enemy with camels and wagons. He launches a devastating attack and routes the Mongols.source
• 1273Autumn – Sultan Muhammad II of Granada sends an embassy to the court of Alfonso X in Seville, where it is received with honour. Alfonso agrees to Granada's demands, to end his support for the Banu Ashqilula, in exchange for the promise that Muhammad becomes Alfonso's vassal. Muhammad pays him 450,000 maravedis each year in tribute and grants the Banu rebels a truce for two years.source
• 1273In Korea, the Sambyeolcho Rebellion against the Goryeo dynasty (a vassal state of the Yuan dynasty) ends as rebel forces are defeated.source
• 1274September 21 – Walter de Merton, English chancellor and regent, retires from royal service, in favour of Robert Burnell, who becomes a strong ally of the Edwardian regime.source
• 1274Abu Yusuf Yaqub ibn Abd al-Haqq, Marinid ruler, enters peacefully into Ceuta, putting an end to some 40 years of the city's independence.source
• 1275March – Mongol forces (some 200,000 men) under Bayan of the Baarin ("Hundred Eyes") defeat a Chinese army of 130,000 men led by the Song chancellor Jia Sidao on the Yangtze River. Sidao sends an emissary to Bayan to discuss a truce, but he declines to negotiate. Dowager Empress Xie Daoqing strips Sidao of his rank and titles, and he is later on her orders executed by one of his own guards as he is being sent to exile in Fujian.source
• 1275April – The Japanese era Bun'ei ends and the Kenji era begins during the reign of the 8-year-old Emperor Go-Uda (until 1278).source
• 1275June 14 – Battle of Hova: King Valdemar Birgersson of Sweden is defeated by his brother Magnus in the forest of Tiveden.source
• 1275August – Gregory X persuades King Alfonso X of Castile ("the Wise") to give up his claim to the title of "King of the Romans". Gregory gains support in northern Italy through Rudolf I, king of Germany.source
• 1275September 8 – Battle of Écija: A Castilian army led by Nuño González de Lara is defeated by Marinid forces.source
• 1275October 8 – Battle of Ronaldsway: Scottish forces under John de Vesci defeat the Manx people of the Isle of Man in a decisive battle, firmly establishing Scottish rule of the island.source
• 1275October 21 – Battle of Martos: A Castilian army under Sancho of Aragon (archbishop of Toledo) is defeated by the Moors at Martos.source
• 1275December 12 – Battle of Roccavione: Ghibelline forces defeat a Neapolitan army at Roccavione (Piedmont).source
• 1275The mountain fortress Alamut Castle ("Eagle's Nest") is temporarily recaptured from the Mongols by a Nizari force under Shams al-Din Muhammad.source
• 1275Marinid forces take the city of Algiers, at this time independent.source
• 1276June – King Rudolf I of Germany declares war on his rival Ottokar II of Bohemia. After 6 months of campaigning, Ottokar surrenders all his lands (including Austria and Styria) except Bohemia and Moravia. Rudolf makes Vienna his capital, marking the beginning of the House of Habsburg, which will last until 1918.source
• 1276Sultan Abu Yusuf Yaqub ibn Abd al-Haqq and Muhammad II, ruler of Granada, agree to a truce with King Alfonso X of Castile ("the Wise") for two years. Before Abu Yusuf leaves, Muhammad's secretary addresses a poem to Abu Yusuf, expressing fear of Castile's power and appealing for Marinid's continued support. Later, Abu Yusuf lands at Alcázar Seguir on January 19. This ending the first Marinid invasion in Al-Andalus (modern Spain).source
• 1276Battle of Dongola: Mamluk forces led by Sultan Baibars gain a decisive victory against the Kingdom of Makuria. They capture the Makurian capital of Dongola and force King David of Makuria to flee upstream on the Nile. He seeks refuge in the Kingdom of Al-Abwab, but is handed over to Baibars, who has him executed. Later, Baibars conquers Al-Maris (Lower Nubia), previously a part of Makuria, and annexes it into Egypt.source
• 1276Spring – The court of the Southern Song dynasty of China and hundreds of thousands of its citizens flee from Hangzhou to Fujian, and then Guangdong, in an effort to escape a Mongol invasion under Kublai Khan.source
• 1276The mountain fortress Alamut Castle ("Eagle's Nest") is again captured by the Mongols from a Nizari force under Shams al-Din Muhammad.source
• 1276King Edward I of England ("Longshanks") orders the people of Bayonne in Gascony (as part of the only English possessions in France) to provide Castile with warships "to resist the Saracens by sea", but excuses himself from personal participation against the Marinid invasion in Spain because of his wars in Wales and his plan to lead a Crusade to the Holy Land.source
• 1277January 21 – Battle of Desio: Lombard forces under Archbishop Ottone Visconti defeat the Della Torre family troops for the rule of Milan. Later, Ottone enters the city in triumph, and imprisons Napoleone della Torre in the Castello Baradello at Como (Northern Italy).source
• 1277April 15 – Battle of Elbistan: A Mamluk army (some 14,000 men) under Sultan Baibars marches from Syria into the Mongol-dominated Sultanate of Rum and attacks the Mongol occupation force at Elbistan. Baibars, with at least 10,000 horsemen, defeats and overwhelms the Mongol forces. After the battle, he marches unopposed to Kayseri in the heart of Anatolia in triumph and enters the city on April 23.source
• 1277August – Marinid forces led by Sultan Abu Yusuf cross the Strait of Gibraltar and marches north, ravaging the districts of Jerez de la Frontera, Seville and Córdoba.source
• 1277In Japan, a 20 kilometer stone wall defending the coast of Hakata Bay at Fukuoka on the island of Kyushu is completed; it is built in response to the attempted Yuan dynasty Mongol invasion of Japan in 1274.source
• 1277Summer – Uprising of Ivaylo: An uprising under Ivaylo breaks out in northeastern Bulgaria against the failure of Emperor Konstantin Tih to cope with the constant Mongol invasions which have devastated the country for years. Ivaylo confronts and defeats the plundering Mongols, and by autumn all Mongols are driven out of Bulgarian territory. In return, Konstantin gathers a small army and tries unsuccessfully to suppress the revolt but is himself killed in battle.source
• 1277Battle of Ngasaunggyan: A Burmese army (some 80,000 men) led by King Narathihapate (or Sithu IV) invades Mongol territory in Yunnan. The invasion is repelled by the Mongol forces, who counterattack, reaching as far south as the fortress city of Kaungsin ("Gold Teeth"), which guards the Bhamo Pass in northern Myanmar. Later, the Burmese Pagan Empire begins to disintegrate after several Mongol invasions under Kublai Khan.source
• 1277Migration of the (Southern) Song dynasty: Some 50,000 citizens of the Song dynasty in China become the first recorded inhabitants of Macau, as they seek refuge from the invading armies of the Yuan dynasty. They also stay for a short period in (New) Kowloon.source
• 1278January – Charles I is crowned King of Jerusalem, and is recognized by the kingdom's barons at Acre. He surrenders the vicariate of Tuscany to Nicholas III. His bailiff, Roger of San Severino, appoints various Frenchmen from Charles' court as his chief officers. Bohemond VII, count of Tripoli (and nominal Prince of Antioch), acknowledges Roger as lawful bailiff.source
• 1278August 5 – Reconquista: Siege of Algeciras – Castilian forces (some 30,000 men) led by King Alfonso X ("the Wise") besiege Algeciras (at this time under control of the Marinids). A fleet of 24 ships and some 80 galleys is placed in the Bay of Gibraltar to prevent the supply of the city from nearby Gibraltar. The fleet is made up of most of the members of the Order of Saint Mary of Spain, a military-religious order which is concentrated in naval warfare.source
• 1278August 26 – Battle on the Marchfeld: German-Hungarian forces (some 9,000 men) led by Kings Rudolf I of Germany in alliance with Ladislaus IV of Hungary ("the Cuman"), defeat and kill Ottokar II, ruler of Bohemia. The battle ends the power struggle between Rudolf and Ottokar over the fate of Central Europe. Rudolf's House of Habsburg will continue to rule Austria and other captured territories until the end of World War I in 1918.source
• 1278September 29 – Reconquista: Aragonese forces led by King Peter III take the Muslim stronghold of Montesa, putting an end to two years of Mudéjar rebellion. The defeated Muslims are expelled from the realm and go into exile.source
• 1279March 5 – Battle of Aizkraukle: Lithuanian forces led by Grand Duke Traidenis defeat an army of Teutonic Knights of the Livonian Order at Aizkraukle. During the battle, the order suffers a great defeat, some 70 knights are killed, including Grand Master Ernst von Ratzeburg (or Rassburg). The Semigallians, allies of the Livonian Order, revolt but later submit to Traidenis for protection.source
• 1279April 17 – Thawun Gyi settles at Taungoo (modern-day Myanmar), and becomes the first ruler of the Toungoo dynasty (until 1317).source
• 1279July 20 – Siege of Algeciras: Castilian forces led by King Alfonso X ("the Wise") abandon the siege (begun in 1278), after their fleet (some 400 ships) is destroyed by the Marinids led by Sultan Abu Yaqub Yusuf an-Nasr. All prisoners are decapitated except the officers who are taken hostage. For the second time, the entire Castilian fleet is lost and Alfonso is forced to sign a new truce.source
• 1279Spring – Mamluk forces led by the 19-year-old Sultan Al-Said Barakah and Qalawun ("the Thousander") invade Cilician Armenia; a revolt in Egypt while they are away force Barakah to abdicate. In August, Qalawun takes over the government in Cairo and proclaims himself sultan. He sends Solamish, youngest son of former Sultan Baibars, into exile. Meanwhile, Sunqur al-Ashqar, Mamluk viceroy of Damascus, refuses to accept Qalawun's authority and begins a rebellion in Syria.source
• 1279Ram Khamhaeng becomes the third king of the Phra Ruang dynasty, ruling the Sukhothai Kingdom (modern-day Thailand).source
• 1279The Chola dynasty of South India falls under the rule of Rajendra Chola III, due to attacks by the Hoysala Empire and Pandya kingdom.source
• 1280June 18 – Battle of al-Jassora: Syria attempts to secede from the Mamluk Sultanate of Egypt, but Al Mansur Qalawun defeats the rebels and keeps Syria within the Egyptian sultanate.source
• 1280June 23 – Reconquista: Battle of Moclín – Troops of the Emirate of Granada defeat those of the Kingdom of Castile and Kingdom of León.source
• 1280Tsar Ivan Asen III of Bulgaria flees from Tarnovo, ending the Asen dynasty in Bulgaria.source
• 1280Turin is conquered by Thomas III of Savoy, becoming the capital of the House of Savoy.source
• 1281June – Reconquista: Castilian forces led by King Alfonso X ("the Wise") and accompanied by his sons, the Infantes Sancho, Peter and John, invade the lowlands of Granada. Sultan Muhammad II of Granada sends a Moorish army, supported by many archers and cavalry, to repel them. Alfonso defeats the Moors in a battle near Granada's walls on June 25, but after the failure of the negotiations that follow, he leaves Granada.source
• 1281August 15 – Battle of Kōan (or Second Battle of Hakata Bay): A second Mongol invasion of Japan is foiled, as a large typhoon, famously called a kamikaze, or 'divine wind', destroys much of the combined Mongol and Chinese fleet and forces, numbering over 140,000 men and 4,000 ships. Later, Kublai Khan begins to gather forces to prepare for a third invasion attempt, but is distracted by events in Southeast and Central Asia.source
• 1281September – Two Mongol armies (some 50,000 men) advance into Syria. One is commanded by Abaqa Khan, who attacks the Mamluk fortresses along the Euphrates frontier. The second, led by his brother Möngke Temür makes contact with Leo III, king of Cilician Armenia, and then marches down through Aintab and Aleppo into the Orontes valley, where he is joined by Knights Hospitallerr and some French mercenaries. Meanwhile, Sultan Qalawun assembles his Mamluk forces at Damascus.source
• 1281October 29 – Second Battle of Homs: In a pitched battle, Mamluk forces (some 30,000 men) led by Qalawun destroy the Mongol center; Möngke Temür is wounded and flees. He orders a retreat, followed by a disorganized army. The Armenian-Georgian auxiliaries under Leo III fight their way back northwards. The Mongol army recrosses the Euphrates without losses; the river remains the frontier between the Mongols and the Mamluk Sultanate.source
• 1281The Mon Kingdom of Hariphunchai falls, as its capital Lamphun (in modern-day Thailand) is captured by King Mangrai's Lannathai Kingdom.source
• 1282March 30 – War of the Sicilian Vespers: A group of Sicilian conspirators begins an uprising against the rule of King Charles I of Sicily; over the next six weeks, thousands of French are killed. The rebellion forces Charles to abandon the planned crusade against the Byzantines, while still en route to the target city of Constantinople, and allows King Peter III of Aragon ("the Great") to take over rule of the island from Charles (which in turn leads to Peter's excommunication by Pope Martin IV).source
• 1282March – Welsh forces under Prince Dafydd ap Gruffydd, brother of Llywelyn ap Gruffudd, attack and take control of Hawarden Castle. The garrison is massacred and Constable Roger de Clifford is taken prisoner. Llywelyn, who has sworn fealty to King Edward I of England ("Longshanks"), joins Dafydd in his revolt against the English. Their actions lead to the final English conquest of Wales, by Edward.source
• 1282May 1 – Battle of Forlì: A French expeditionary army under Jean d'Eppe launches an assault on Forlì and breaches the outer wall. While they plunder the suburbs, Guido I da Montefeltro sends a small force out the gate on the opposite side of the city. In an ambush, forces of the Guelphs and Ghibellines defeat the main army of d'Eppe, who is forced to retreat to Faenza. He asks the Pope for reinforcements, but this is refused.source
• 1282June 17 – Battle of Llandeilo Fawr: English forces led by Gilbert de Clare are ambushed and defeated by Welsh troops at Llandeilo. English expansion into southern Wales is halted.source
• 1282June – The 24-year-old Prince Sancho, heir to the throne of Castile, assembles a coalition of nobles and starts a massive rebellion against his father, King Alfonso X. He dispatches his brothers into the realm to claim strategically important cities and castles. Only the cities of Seville, Murcia and Badajoz remain loyal to Alfonso, who becomes isolated politically and abandoned by most of his family.source
• 1282August – Castilian forces under Sancho lay siege to Badajoz, but eventually retreat as the combined armies of Alfonso X relieve the city. Shortly after, Alfonso marches to Córdoba and demands the key of the city. This is refused by Diego López V de Haro, speaking on behalf of the magnates. Meanwhile, the Marinids plunder the Guadalquivir valley.source
• 1282September or October – Battle of Lake Hód: Hungarian forces led by King Ladislaus IV successfully repel and defeat an invading Cuman army. Ladislaus receives the title "the Cuman" for his heroic victory.source
• 1282November 6 – Battle of Moel-y-don: English forces led by Luke de Tany are ambushed and defeated by Welsh troops, while crossing over a floating bridge to the island of Anglesey.source
• 1282November – Castilian forces under Alfonso X reconquer Córdoba. Pope Martin IV issues a papal bull, forcing Sancho and his nobles to proclaim their allegiance to Alfonso, ending the rebellion.source
• 1282December 11 – Battle of Orewin Bridge: English forces (some 6,000 men) under Edward I of England defeat a Welsh army near Cilmeri. Llywelyn ap Gruffudd is killed.source
• 1282Summer – An Aragonese expeditionary army under King Peter III lands in North Africa at Collo, in proclaimed support of a rebellion of the governor of Constantine, Ibn Wazir. The revolt is suppressed by Abu Ishaq Ibrahim I, ruler of the Hafsid Sultanate. Peter, wary of the situation in Sicily, sails off and fails to take advantage of the state of rebellion in North Africa. Ibrahim stabilizes his power and styles himself emir of the sultanate.source
• 1282Dutch forces led by Floris V, count of Holland, attack and defeat the West Frisians at the battle of Vronen. He succeeds in retrieving the body of his father, William II, some 26 years dead.source
• 1283January 18 – King Edward I of England ("Longshanks") captures Dolwyddelan Castle in North Wales from the Welsh.source
• 1283February 13–14 – Battle of Thị Nại Bay: A Mongol-led Yuan expeditionary force (some 5,000 men) lands on the beach, near Champa's capital Vijaya in Vietnam. Despite being outnumbered, the Yuan invaders break the Cham defensive line and force King Indravarman V to retreat to the Western Highlands, where he wages a successful guerrilla campaign against the occupying Yuan forces.source
• 1283April 25 – The last independent Welsh stronghold, Castell y Bere, is surrendered by Cynfrig ap Madog to the English.source
• 1283July 8 – Battle of Malta: An Aragonese fleet (some 20 galleys) under Admiral Roger of Lauria attacks and defeats the Angevin ships in the Grand Harbour, sent to help put down a rebellion on Malta. Lauria lands his troops at the harbour and after two days raises his banner on the fortified city of Mdina ("Old City").source
• 1283October 3 – The last ruler of an independent Wales, Dafydd ap Gruffydd (David), Prince of Wales, is executed in Shrewsbury, the first prominent person in history to be hanged, drawn and quartered, as capital punishment for the newly created crime of high treason (against Edward I of England).source
• 1283Abu Ishaq Ibrahim I, ruler of the Hafsid Sultanate, is overthrown by the Bedouin rebellion, led by Abd al-Aziz I.source
• 1283Mongol forces invade the Khmer Empire (modern Cambodia). King Jayavarman VIII decides to pay tribute rather than fight the invasion, buying peace and preserving the empire.source
• 1283Castles and Town Walls of King Edward in Gwynedd: Construction of Caernarfon Castle, Conwy Castle and Harlech Castle in Wales by Edward I of England begins as a system of defenses against possible future Welsh uprisings.source
• 1283Mongol invasion of Burma: Mongol forces besiege the fortress at Ngasaunggyan on September 23. The Burmese garrison withstands the siege for two months, but finally falls to the invaders on December 3. The defeat breaks the morale of the Burmese defenses. Kaungsin, the next fortress in line, falls just six days later.source
• 1284June 5 – Battle of the Gulf of Naples: An Aragonese-Sicilian fleet (some 30 galleys) led by Admiral Roger of Lauria surrounds and defeats the Neapolitan ships in the Gulf of Naples. King Charles II of Naples ("the Lame") is captured during the battle; disorganized, the remnants of the Neapolitan fleet (between 15 and 18 galleys) flee back to Naples.source
• 1284August 5–6 – Battle of Meloria: A Genoese fleet (some 90 galleys) led by Admiral Oberto Doria defeats the Pisan ships in the Ligurian Sea. This marks the decline of the maritime power of Pisa in the Mediterranean.source
• 1284King Peter III of Aragon takes advantage of the weakness of the Hafsid dynasty and raids the island of Djerba. Aragonese forces massacre the population and occupy the island.source
• 1284Hafsid forces under Abu Hafs Umar bin Yahya (half-brother of Abu Ishaq Ibrahim I) reconquer Tunis and reinstall the Hafsid dynasty as the dominating power in Ifriqiya. This ends the Bedouin rebellion started in 1283.source
• 1284Jean de Meun, French poet and writer, translates Vegetius' 4th century military treatise De Re Militari from Latin into French.source
• 1284The events giving rise to the story of the Pied Piper of Hamelin take place in Lower Saxony.source
• 1285April – Marinid forces under Sultan Abu Yusuf Yaqub ibn Abd al-Haqq cross the straits from Alcácer Seguir to Tarifa. From there they advance to Jerez de la Frontera, where they besiege the city. Marinids detachments are dispatched to devastate a broad area from Medina-Sidonia to Carmona, Vejer de la Frontera, Écija and Seville, cutting down trees, orchards, and vineyards, destroying villages, and killing or capturing many inhabitants.source
• 1285May 22 – Marinid forces under Abu Yusuf Yaqub ibn Abd al-Haqq prolong their siege at Jerez de la Frontera. He sends his son Abu Yaqub Yusuf an-Nasr with 5,000 regulars, 2,000 cavalry, some 13,000 infantry and 2,000 archers to raid Seville and its environs on June 1. During June and early July, the Marinids assault daily Jerez while raiding parties pillage the countryside at Carmona, Niebla, Écija, Seville and Sanlúcar de Barrameda.source
• 1285May – King Sancho IV (the Brave) assembles his army at Seville and sends the Castilian fleet (some 100 ships) led by Admiral Benedetto I Zaccaria to blockade the mouth of the Guadalquivir River. Meanwhile, a Marinid detachment of 1,000 cavalry moves against Seville, routing the Castilians send out to oppose them. Turning eastward against Carmona and Alcalá de Guadaíra, the Marinids burn the suburbs, harvest and ruin orchards.source
• 1285June 24 – Battle of Chương Dương: Joint forces of Champa and Đại Việt defeat the Mongol-led Yuan fleet on the Red River. Most of the Yuan warships are burned during the battle, and the Mongol army retreats to China in late June. The Vietnamese royal court returns to the capital in Thang Long following a six-month conflict.source
• 1285August – Castilian forces led by Sancho IV (the Brave) march against the Marinids at Jerez de la Frontera. Meanwhile, Abu Yusuf Yaqub ibn Abd al-Haqq with his army of 18,000 cavalry and faced with dwindling supplies, decides to lift the siege after five months, on August 2. He withdraws his army to the safety of Algeciras and opens negotiations with Sancho while the Castilian fleet arrives at El Puerto de Santa Maria (or "The port of Saint Mary").source
• 1285September 4 – Battle of Les Formigues: An Aragonese-Sicilian fleet (some 40 galleys) under Admiral Roger of Lauria defeats French and Genoese ships near the Formigues Islands. According to Johan Esteve de Bezers, a French troubadour, all prisoners but one have their eyes gouged out, and that one is left with one eye to guide the others. After the battle, Roger captures about 15 to 20 French galleys, and others are sunk or burnt.source
• 1285Winter – The Mongol Golden Horde led by Nogai Khan and Talabuga attacks Hungary for the second time. They successfully subdue Slovakia and sack territory north of the Carpathian Mountains.source
• 1286June 4 – The 15-year-old Henry II sails from Cyprus and lands in Acre, but is refused entry into the citadel. There, he stays for six weeks in the palace to negotiate an agreement to take over the city from the Angevins.source
• 1286Abu Hafs Umar I, ruler of the Hafsid Sultanate, takes control of Béjaïa and becomes a rival of the main Hafsid entity based in Tunis.source
• 1286In the Lao kingdom of Muang Sua, King Panya Leng is overthrown in a coup d'état led by his son, Prince Panya Khamphong, which is likely to have been supported by the Mongol-led Yuan Dynasty in China.source
• 1286Old Prussians resettle in Samland and start an uprising against Teutonic rule (supported by the Principality of Rügen). The Prussians are defeated by the Teutonic Knights and forced to submit.source
• 1286The War of the Donkey is fought between the rival noble families of the Ghisi and the Sanudo, in the Duchy of the Archipelago in the Aegean Sea.source
• 1286Kublai Khan makes plans for a final Mongol invasion of Japan, but aborts the preparations due to a lack of necessary resources.source
• 1287March – Mamluk forces under Sultan Qalawun (the Victorious) capture Latakia, last remnant of the Principality of Antioch. The city port falls easily into his hands, but the defenders retire to the citadel at the mouth of the harbour. Finally, Qalawun forces the Crusader garrison to surrender on April 20.source
• 1287June 8 – Welsh forces led by Rhys ap Maredudd revolt in Wales against King Edward I (Longshanks). Although Maredudd has assisted the English in the past, he accuses Edward of treating him unfairly over taxes. The rebels burn several towns, including Swansea and Carmarthen. They capture most of Ystrad Tywi, heartland of Deheubarth (the revolt will not be suppressed until 1288).source
• 1287June 23 – Battle of the Counts: An Aragonese-Sicilian fleet (some 50 galleys) under Admiral Roger of Lauria defeat a larger Angevin fleet of 70 galleys near Naples. After a feigned retreat, Roger attacks the Angevin galleys from all sides. During the battle, which last much of the day, the Angevin fleet is scattered, leaving about 40 galleys to be captured, along with 5,000 prisoners. After the victory, without any authorization from King James II, Roger makes a truce with the Neapolitans (who are allies of the Angevins).source
• 1287June – Egyptian Mamluk forces under Sultan Qalawun (the Victorious) captures Dongola after defeating the Kingdom of Makuria under the leadership of Egyptian general Izz al-Din al-Kawrani.source
• 1287December – Battle of Pagan: Mongol-led Yuan forces (some 7,000 cavalry) led by Temür Khan defeat King Thihathu of the Pagan Kingdom. The kingdom disintegrates and anarchy ensues.source
• 1287Spring – Arghun Khan, Mongol ruler of the Ilkhanate, sends an embassy under Rabban Bar Sauma with the mission of contracting a military alliance against the Mamluk Sultanate and take the city of Jerusalem. He travels with a large retinue (bearing gifts and letters) and 30 riding animals from Tabriz through Armenia to Trebizond. Bar Sauma arrives in Constantinople and receives an audience with Emperor Andronikos II (Palaiologos).source
• 1287Alfonso III (the Liberal) is forced to make concessions to the nobility after an aristocratic uprising (called the Union of Aragon). In particular, he grants his barons a "Bill of Rights", known as the Privilegium Generale. This leaves a heritage of disunity and further dissent among the nobility, who increasingly see little reason to respect the throne, and brings the Crown of Aragon to the point of anarchy. Alfonso, who is not pleased with the anti-royalist movement, is forced to accept the Magna Carta (Great Charter).source
• 1287Summer – Edward I (Longshanks) replies to the Welsh rebellion by raising an army at Gloucester commanded by Edmund of Almain. The English forces besiege Dryslwyn Castle, which lasts for three weeks before the castle falls after the curtain walls are undermined. Rhys ap Maredudd manages to escape and goes into hiding before the stronghold is finally captured in late September.source
• 1287Winter – Mongol invasion of Poland: Mongol forces (some 30,000 men) under Talabuga Khan and Nogai Khan, attack Poland for the third time. The cities of Lublin, Sandomierz and Sieradz are devastated by the invaders. Nogai Khan besieges Kraków and launches an unsuccessful assault on the fortified city, suffering heavy casualties in the process.source
• 1288April 9 – Battle of Bạch Đằng: Đại Việt (Vietnamese) general Trần Hưng Đạo sinks the fleet of an invading Mongol-led Yuan expeditionary army (some 94,000 men). He orders the placing of steel-tipped bamboo stakes (to create an ambush) in the Bach Dang River near Ha Long Bay. This ends the intentions of Kublai Khan to conquer Vietnam and Champa.source
• 1288April – The Japanese era Kōan ends and the Shōō era begins during the reign of the 22-year-old Emperor Fushimi (until 1293).source
• 1288June 5 – War of the Limburg Succession – Battle of Worringen: Brabantian forces under Duke John I defeat the coalition army of Cologne, Luxemburg, and Nassau at Worringen (in a struggle to conquer the Duchy of Limburg). John liberates the city of Cologne from rule by the Electorate of Cologne, which has previously been one of the major ecclesiastical principalities of the Holy Roman Empire.source
• 1288A civil war breaks out on Gotland between the burghers of Visby and the rural farmers of Gotland; while the exact reason for this war is unknown, the most likely reason is the construction of a large wall around Visby, and the introduction of a toll, which the farmers were forced to pay.source
• 1288The oldest-known bronze handgun in the world is dated to this year, a Chinese gun found in Acheng District, that was once used to suppress the rebellion of the Mongol prince Nayan.source
• 1288Summer – Sultan Muhammad II drives the rebellious Banu Ashqilula from one stronghold to the next, where they are finally expelled from Granadan territory in Al-Andalus (modern Spain). Meanwhile, Muhammad manages through diplomatic intrigue, to turn the Castilian aristocracy against King Sancho IV. In response, King Alfonso III proclaims the 18-year-old Alfonso de la Cerda as ruler of Castile and León.source
• 1288Spring – Genoa orders Admiral Benedetto Zaccaria to send five galleys to support Genoese suzerainty of Tripoli. Princess Lucia, sister of the late Count Bohemond VII, arrives in Acre, where the Knights Hospitaller escort her to the frontier with Tripoli. The commune refuses to accept her as new ruler and places the city under Genoese protection. After negotiations, Lucia offers to confirm Genoa's existing commercial privileges in Tripoli.source
• 1289February 9 – Sultan Qalawun (the Victorious) marches the Mamluk army out of Cairo, leaving his son Al-Ashraf Khalil commanding Cairo's Citadel, supported by Viceroy Baydara al-Mansuri. The army moves via Salihiya, across Sinai and through Jordan to Damascus. He orders the regional governors of Syria to mobilize in Damascus, where many infantry volunteers have assembled.source
• 1289March – The 19-year-old King Henry II sends his younger brother Almalric, with a company of knights and 4 galleys to Tripoli (modern Lebanon). Meanwhile, many non-combatant citizens flee to Cyprus. The Mamluk army arrives before Tripoli and begins the attack with siege engines, while building buches (wooden defensive structures) outside the city on March 25.source
• 1289April 26 – Siege of Tripoli: Mamluk forces under Qalawun (the Victorious) capture Tripoli after a month-long siege, thus extinguishing the County of Tripoli. Qalawun orders the city to be razed to the ground, a widespread massacre kills every man found by the Mamluks, while the women and children are taken as slaves.source
• 1289June 11 – Battle of Campaldino: Pro-papal Guelph forces of Florence and their allies, Lucca, Pistoia, Prato and Siena under Viscount Aimery IV defeat the Ghibelline army (some 10,000 men) in Tuscany. Florence becomes the dominant power in Central Italy; powerful merchant guilds take on a more political role in the communal government against their rivals of Genoa, Pisa and Venice.source
• 1289July 7 – Battle of Copenhagen: A Norwegian expeditionary force under King Eric II, supported by Danish outlaws, sets sail to Copenhagen and attacks the city. But they are repelled and forced to withdraw to Zealand.source
• 1289July–August – Admiral Benedetto Zaccaria, having escaped from Tripoli, starts a naval campaign against Mamluk shipping and raids Tinnis in Egypt. In response, Qalawun closes Alexandria to Genoese merchants.source
• 1290August 30 – Survivors and relatives of the massacre at Acre take bloodstained clothing to Sultan Qalawun ("the Victorious") in Cairo, who demands that the leaders of the riot be handed over for trial, but the nobles refuse to send them and Qalawun now obtains legal clearance from the religious authorities in Cairo to break the truce with Crusader states.source
• 1290August – Italian Crusaders massacre Muslim merchants and peasants, and some local Christians in Acre. Some claim it began at a drunken party – others that a European husband found his wife making love to a Muslim. The barons and local knights try to rescue a few Muslims and take them to the safety of the castle, while some ringleaders are arrested.source
• 1290October – Qalawun orders a general mobilization of the Mamluk forces. In a council, it is decided that a peace delegation be sent to Cairo under Guillaume de Beaujeu, Grand Master of the Knights Templar. However, Qalawun demands huge compensation for those killed in Acre, and sends a Syrian army to the coast of Palestine, near Caesarea.source
• 1291May 10 – Edward I meets the claimants for the Scottish crown at Norham Castle and informs them that he will judge the various claims to the throne, but they must acknowledge him as overlord of Scotland and, to ensure peace, surrender the royal castles of the kingdom into his keeping.source
• 1291June – Al-Ashraf Khalil enters Damascus in triumph with Crusaders chained at their feet and the captured Crusader standards, which are carried upside-down as a sign of their defeat. Following the capture of Acre, Khalil and his Mamluk generals proceed to wrest control of the remaining Crusader-held fortresses along the Syrian coast. Within weeks, the Mamluks conquer Tyre, Sidon, Beirut, Haifa and Tartus.source
• 1291July – Thibaud Gaudin arrives with the surviving knights, with the treasure of the Order, in Sidon. There, he is elected as Grand Master of the Knights Templar, to succeed Guillaume de Beaujeu (who was mortally wounded during the siege of Acre). Shortly after, Mamluk forces attack Sidon and Gaudin (who has not had enough knights to defend) evacuates the city and moves to the Sidon Sea Castle on July 14.source
• 1291August 6 – A combined Genoese-Sevillian fleet led by Admiral Benedetto Zaccaria wins a victory over 27 Marinid galleys at Alcácer Seguir –12 galleys are taken and the rest put to flight. The following day, Benedetto drags the captured vessels along the coast in view of Abu Yaqub Yusuf an-Nasr, Marinid ruler of Morocco, who, "defeated and dishonored", withdraws his fleet to Fez.source
• 1291August 14 – Mamluk forces conquer the last Crusader outpost in Syria, the Templar fortress of Atlit south of Acre. All that now is left to the Knights Templar is the island fortress of Ruad. Al-Ashraf Khalil returns to Cairo in triumph as the "victor in the long struggle against the Crusader states".source
• 1291Late September – Abu Yaqub Yusuf an-Nasr crosses the Strait of Gibraltar from Alcácer Seguir to Tarifa. During the next three months, Marinid forces besiege Vejer de la Frontera, and carry out daily raids around Ferez. In the meantime, other Marinid raiding parties devastate the countryside as far north as Alcalá del Río, near Seville.source
• 1291Spring – Several nobles unsuccessfully claim the Scottish throne (a process known as the 'Great Cause'), including John Balliol, Robert de Brus, John Hastings and William de Vesci. Fearing civil war, the Guardians of Scotland ask King Edward I of England to arbitrate. Before agreeing, he obtains concessions to revive English overlordship over the Scots.source
• 1292June 24 – Castilian forces led by King Sancho IV ("the Brave") begin the siege of Tarifa: eleven newly built engines bombard the city constantly by land and sea. Meanwhile, Muhammad II, Nasrid ruler of Granada, provides the army of Sancho with men, arms and also aids the blockade in the Strait of Gibraltar. Muhammad attacks Marinid outposts and his forces seize Estepona on the coast to the west of Málaga. Sancho conquers Tarifa after a siege of four months, on October 13.source
• 1292December – John Balliol is summoned by Edward I to Westminster to answer an appeal by Macduff of Fife against a judgment imposed on him by the Scottish Parliament. John refuses to answer Macduff's appeal, 'without consulting the people of his realm'. Edward asks for compensation for the violation of English law and demands to hand him over three Scottish castles as repayment for the crime committed.source
• 1292December – Muhammad II sends ambassadors to the Castilian court to ask Sancho IV to surrender Tarifa. Sancho refuses to yield the city to Granada and Muhammad, feeling betrayed, switches sides to form an alliance with the Marinids.source
• 1292Al-Ashraf Khalil returns to Damascus and assembles an army to attack Sis, the capital of the Armenian Kingdom of Cilicia. An Armenian embassy arrives in Damascus, and reaches a settlement with Khalil. The cities of Til Hemdun, Marash and Behesni are given to the Mamluks in order to maintain peace.source
• 1292King Mangrai the Great of Ngoenyang conquers and annexes the Mon kingdom of Hariphunchai, creating a political union in the form of the Lan Na Kingdom.source
• 1292Kublai Khan sends a Mongol expeditionary force (some 20,000 men) to Java. He collects an invasion fleet with some 500–1,000 ships and enough provisions for a year from Fujian, Jiangxi and Huguang in southern China. The fleet travels past Champa (modern Vietnam) and the Karimata Islands. The Mongols land on Java, taking the capital of Kediri, but it proves impossible to hold.source
• 1293May 31 – The forces of Raden Wijaya win a major victory in the Mongol invasion of Java, which is considered to be the founding date of the city of Surabaya.source
• 1293December – Mamluk sultan of Egypt Khalil is assassinated by his regent Baydara, who briefly claims the sultanate, before being assassinated himself by a rival political faction.source
• 1294March 30 – Third Swedish Crusade: a Novgorodian army led by Prince Roman Glebovich attempts a storm of Vyborg, but the attack fails.source
• 1294Autumn – In response to the actions of new royal administrators in north and west Wales, Madog ap Llywelyn leads a revolt against his English overlords.source
• 1294Spring – Following the arrival of a fleet from Sweden, an offensive takes place in which Sweden captures Kexholm after an assault.source
• 1294John Balliol, King of Scotland, decides to refuse King Edward I of England's demands for support in a planned invasion of France, the result being the negotiation of the Auld Alliance with France and Norway in the following year. These actions play a part in precipitating the Scottish Wars of Independence, which begin in 1296.source
• 1295March 5 – Battle of Maes Moydog: English forces led by William de Beauchamp, 9th Earl of Warwick defeat the Welsh rebels (some 700 men), near the modern-day town of Llanfair Caereinion in Wales. In a night attack on the Welsh infantry, William uses cavalry to drive them into compact formations, which are then shot up by his archers. Madog ap Llywelyn, proclaimed "Prince of Wales", and the remnants of his army are routed and retreat across the Banwy River, in which many drown.source
• 1295July 22 – War of Curzola: Genoese raids on the Venetian quarter in Constantinople lead to a formal declaration of war with the Republic of Venice. A Venetian fleet (some 40 war galleys) attacks Galata, the quarter of the Genoese merchants. Emperor Andronikos II Palaiologos arrests surviving Venetians in the capital and joins the war with the Republic of Genoa.source
• 1295October 4 – Mongol leader Baydu Khan is executed after a 7-month reign at Tabriz. He is succeeded by Ghazan, who becomes ruler of the Ilkhanate. He converts to Islam, ending a line of Vajrayana (Tantric Buddhist) leaders.source
• 1295Marco Polo returns to Venice after 24 years of travel in China. When the Polos arrive, Venice is engaged in a naval war with the rival city of Genoa. Marco joins the war and arms a galley equipped with a trebuchet.source
• 1296March 30 – Capture of Berwick: King Edward I of England storms and captures Berwick-upon-Tweed, sacking what is at this time a Scottish border town, with much bloodshed. He slaughters most of the residents, including those who flee to the churches.source
• 1296April 27 – Battle of Dunbar: John Balliol's Scottish army is defeated by an English army commanded by John de Warenne, 6th Earl of Surrey.source
• 1296Boniface of Verona expels the Byzantines from their last remaining strongholds on Euboea.source
• 1296approximate date – Tarabya, self-proclaimed king of Pegu, is defeated in single combat on war elephants by Wareru.source
• 1297January 8 – Guelph forces, led by the Genoese leader François Grimaldi (il Malizia), storm and capture the Rock of Monaco. François, disguised as a Franciscan friar, gains entry to the city, and opens the gates for his soldiers. He seizes the castle with his stepson Rainier I, an event that is commemorated on the coat of arms of Monaco. Rainier becomes the first sovereign ruler of the House of Grimaldi in Monaco; he rules initially until 1301, but the family will be ruling there into the 21st century.source
• 1297May – William Wallace, Scottish rebel leader, leads an uprising against the English at Lanark and kills Sheriff William Hesselrig. He joins with William Douglas the Hardy, the first Scottish nobleman in rebellion – combining forces at Sanquhar, Durisdeer and Scone Abbey (known as the Raid on Scone) in June. Later, Wallace captures the English treasury at Scone to finance the rebellion against Edward I of England.source
• 1297September 11 – Battle of Stirling Bridge: Scottish forces (some 6,000 men) led by Andrew Moray and William Wallace defeat an English army under John de Warenne at Stirling on the Forth.source
• 1297October–November – Scottish forces led by William Wallace begin raids in Northumberland and Cumberland. During a ceremony at Selkirk, Wallace is knighted and appointed Guardian of Scotland. (Contradicts First Scottish War of Independence that cites William Wallace as having been made a knight and Guardian of Scotland in March, 1298)source
• 1297Winter – Edward I of England accepts a truce proposed by King Philip IV of France ("the Fair") and leaves Flanders. He returns to London and prepares a campaign against William Wallace in Scotland.source
• 1298June 1 – Battle of Turaida: Forces of the Livonian Order are decisively defeated near Turaida Castle by the residents of Riga, allied with the Grand Duchy of Lithuania under Vytenis. After their defeat, the Livonians receive reinforcements from the Teutonic Order and defeat the residents of Riga and Lithuanians near Neuermühlen, on June 28. The knights proceed with their campaign, and besiege and capture Riga. In response, King Eric VI of Denmark ("Menved") threatens to invade Livonia, but a truce is reached and the conflict is mediated by Pope Boniface VIII.source
• 1298July 2 – Battle of Göllheim: German forces of Duke Albert I defeat King Adolf of Nassau at Göllheim over the prince electors' decision, without electoral act – to dethrone Adolf and proclaim Albert the new ruler of Germany at Frankfurt, on July 27. During the battle, Adolf is killed and his army is destroyed with the loss of 3,000 horses.source
• 1298July 22 – First War of Scottish Independence: Battle of Falkirk – English forces (some 15,000 men) led by Edward I defeat a Scottish army led by William Wallace at Falkirk. During the battle, the English knights drive off the Scottish horse and archers, but cannot break the pikemen in the center. The Scottish pikemen are formed in four great "hedgehogs" (known as schiltron) but are destroyed by English longbow archers.source
• 1298September 9 – Battle of Curzola: The Genoese fleet (some 80 galleys) led by Admiral Lamba Doria defeats the Venetian fleet at Curzola. The disaster is almost complete for Venice: 83 of the 95 galleys are destroyed and some 7,000 men are killed. During the battle, Marco Polo, commanding one of the Venetian ships, is captured.source
• 1298Mongol invasion of India (1297–1298): Mongol forces led by Qutlugh Khwaja invade the Sindh region of the Delhi Sultanate and occupy the castle of Sivistan (modern Pakistan). Sultan Alauddin Khalji sends an army under Zafar Khan, who defeats the Mongols, on February 6. Some 20,000 Mongols are killed in the ensuing battle. The survivors are put into chains and brought to Delhi, where they are trampled to death by elephants.source
• 1298After a year's siege, the revolting Italian commune of Palestrina near Rome surrenders to the Papal forces, razed to the ground and salted by order of Boniface VIII, in an act of debellatio.source
• 1298Summer – First War of Scottish Independence: King Edward I of England ("Longshanks") marches from Newcastle upon Tyne with his household to Alnwick and then by way of Chillingham to Roxburgh in Scotland, where he joins the army in July. He proceeds to Lauderdale and encamps at Kirkliston, to the west of Edinburgh, where he remains from July 15 to July 20. The army is accompanied by a long train of supply wagons. Meanwhile, English supply ships, delayed by bad weather, bring food to Leith.source
• 1299February 25 – Sultan Alauddin Khalji orders the army (some 35,000 men) to prepare for the march to Gujarat. One part of the army under Nusrat Khan starts its march from Delhi. Another part, led by Ulugh Khan, marches from Sindh and attacks Jaisalmer along the way. When the army returns from raiding Gujarat, Mongol soldiers stage a mutiny over payment of khums (one-fifth of the share of loot). The mutiny is crushed, the mutineer families in Delhi are punished and executed.source
• 1299May 10 – King Kyawswa of Pagan and his son, Crown Prince Theingapati, are executed at Myinsaing, by the three brothers of the Myinsaing Kingdom (nominally Kyawswa's viceroys), for submitting and being a vassal to the Mongol-led Yuan dynasty (since 1297).source
• 1299December 1 – Battle of Falconaria: Sicilian forces under King Frederick II defeat Philip I of Taranto. During the battle, Philip is taken prisoner.source
• 1299December 22–23 – Battle of Wadi al-Khaznadar: Mongol forces under Ghazan Khan defeat a Mamluk army (some 30,000 men) north of Homs. Sultan Al-Nasir Muhammad flees with the remnants of his army to Damascus. Ghazan splits his forces, one part sacks Damascus and besieges the citadel. Another part pursues the retreating Mamluks as far as Gaza, pushing them back to Egypt.source
• 1299December – Mongol forces (some 10,000 men) led by Ghazan Khan cross the Euphrates River and invade Syria. They continue south, and successfully take Aleppo. There, Ghazan is joined by forces from his vassal state of Cilician Armenia. King Hethum II leads the Armenian army (which includes Templar and Hospitaller knights). He participates during the Mongol offensive and regains all the Armenian territories which have previously been lost to the Mamluks.source