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The 1180s

388 sourced entries across 10 years, inside the 12th century. Each year below opens its own page; the lines under it are that year’s highest-ranked entries.

1180 CE46 entries

  • January 13 – Henry the Lion, Duke of Saxony and Bavaria, is stripped of his duchies and all his imperial fiefs at an Imperial Diet in Würzburg for violating the king's peace. On April 13, Emperor Frederick I Barbarossa issues the Gelnhausen Charter, formally dissolving Henry's former domains. A portion of Saxony is reorganized as the Duchy of Westphalia, while other territories are granted to his ally, Otto I the Redhead, Duke of Bavaria.
  • September 14 – Battle of Ishibashiyama: A Taira force of approximately 3,000 men, led by Ōba Kagechika, defeats Minamoto no Yoritomo near Mount Fuji (in present-day Odawara). Yoritomo narrowly escapes by sea and flees to Awa Province.
  • September 24 – Emperor Manuel I Komnenos dies in Constantinople after a 37-year reign. He is succeeded by his 11-year-old son, Alexios II Komnenos, who will reign briefly as emperor of the Byzantine Empire under the regency of his mother, Maria of Antioch. Maria assumes power as regent (until 1183) and takes as her advisor and lover, Alexios Komnenos (protosebastos), a nephew of Manuel I, which causes scandal and unrest among the Byzantine populace.

1181 CE35 entries

  • January – William VIII of Montpellier frees the teaching of medicine from any monopoly in France, an origin of the University of Montpellier.
  • August 30 – Pope Alexander III dies after a 22-year pontificate at Rome. He is succeeded by the Tuscany-born Lucius III as the 171st pope of the Catholic Church.
  • Jayavarman VII defeats the Chams and assumes control over the Khmer Empire (modern Cambodia).

1182 CE49 entries

  • April – Massacre of the Latins: The Eastern Orthodox inhabitants of Constantinople massacre the Venetian, Genoan, and other Latin officials and traders who rule as agents of Empress Maria of Antioch. She is the mother and regent of 12-year-old Emperor Alexios II.
  • August – Saladin sends an Egyptian fleet to blockade Beirut and leads his forces in the Bekaa Valley. The city is strongly fortified and Baldwin IV rushes with his army up from Galilee – only pausing to collect the ships that lay in the harbors of Acre and Tyre. Failing to take Beirut by assault before the Crusaders arrived, Saladin breaks off the siege and withdraws.
  • November – Al-Nasir, caliph of the Abbasid Caliphate, is shocked by the war between fellow-Muslims and tries to negotiate a peace. Saladin, thwarted by the strong fortifications of Mosul, retreats to Sinjar. He marches to conquer Diarbekir, the richest and the greatest fortress of the Jazira Region (with the finest library in Islam).

1183 CE19 entries

  • June 25 – The Peace of Constance is signed, between Frederick Barbarossa and the Lombard League, forming the legal basis for the autonomy of the Italian city republics.
  • August 14 – Taira no Munemori and the Taira clan take the young Emperor Antoku and the three sacred treasures, and flee to western Japan to escape pursuit by the Minamoto clan (traditional Japanese date: Twenty-fifth Day of the Seventh Month of the Second Year of Juei).
  • The Siege of Kerak is waged between the Ayyubids and the Crusaders, in which regent Guy of Lusignan refuses to fight.

1184 CE38 entries

  • February 19 – Second Battle of Uji: Japanese forces under Minamoto no Yoshinaka are defeated by his cousins, Minamoto no Yoshitsune and Minamoto no Yoritomo, for the control of Japan.
  • May 20 – Diet of Pentecost: Emperor Frederick Barbarossa, Holy Roman Emperor, organises a conference in Mainz. During the diet Frederick negotiates with Henry the Lion about an anti-French alliance with England.
  • June 15 – Battle of Fimreite: King Sverre of Norway defeats and kills his rival, Magnus V (Erlingsson) near Fimreite. Sverre takes the throne and becomes sole ruler of Norway (until 1202).

1185 CE49 entries

  • 25 April–December – John's first expedition to Ireland: King Henry II of England knights his son and heir, the 18-year-old Prince John, newly created Lord of Ireland, and sends him to Ireland, accompanied by 300 knights and a team of administrators to enforce English overlordship. Landing at Waterford, he treats the local Irish rulers with contempt, making fun of their unfashionable long beards. Also failing to make allies amongst the Anglo-Norman settlers, the English army is unable to subdue the Irish fighters in unfamiliar conditions and the expedition soon becomes a complete disaster, returning to England in defeat. Nonetheless, Henry gets John named 'King of Ireland' by Pope Urban III and procures a golden crown with peacock feathers. The expedition is accompanied and chronicled by Gerald of Wales.
  • September 11–12 – Isaac II Angelos leads a revolt in Constantinople and deposes Emperor Andronikos I Komnenos. Andronikos tries in vain to flee across Asia but is captured and killed by an angry mob. Isaac is proclaimed emperor, ending the Komnenos Dynasty.
  • December – Retired Emperor Go-Shirakawa grants Minamoto no Yoritomo the authority to form the first bakufu (shogunate) in Japan, ending the Genpei War.

1186 CE26 entries

  • After the death of the child-king Baldwin V, his mother succeeds him as Sibylla of Jerusalem, and appoints her disfavoured husband Guy de Lusignan king consort. This comes as a shock to Jerusalem's court, who had earlier forced the possible future Queen into promising that should she become so, she would not appoint him the title.
  • Caliph al-Nasir marries Princess Seljuki. Right after her betrothal to him, he brings her to live with him. He then sends an escort to bring her to Baghdad from Rum, consummates the marriage, and gives her priceless jewels and lavish gifts.
  • Hugh de Lacy the Elder, 1st Lord of Meath, is assassinated.

1187 CE50 entries

  • March 13 – Saladin leaves Damascus with his Muslim forces, and sends letters to neighboring countries, asking for volunteers for a forthcoming jihad ("Holy War"). A week later his younger brother Al-Adil, governor of Egypt, leads his forces out of Cairo towards Syria. Meanwhile, Saladin leaves an army under his 18-year-old son Al-Afdal at Busra, to keep watch on the 'Pilgrim road'.
  • September 20–October 2 – Siege of Jerusalem: Egyptian army under Saladin captures Jerusalem, after the Crusaders led by Balian of Ibelin surrender the 'Holy City'. The take-over of the city is relatively peaceful; Saladin agrees to let the Muslims and Christians leave the city, taking with them their goods. Balian joins his wife Maria Komnene and family, in the County of Tripoli.
  • November – Richard of Poitou, son of King Henry II, take the Cross to help capture Jerusalem from the Muslims. He empties his coffers for the mission and makes a deal with King William the Lion of Scotland, giving him full feudal autonomy in return for cash.

1188 CE32 entries

  • March 27 – Emperor Frederick I (Barbarossa) holds a Diet at Mainz and takes the Cross, followed by his 21-year-old son, Frederick IV, and other German nobles. He sends a delegation to present an ultimatum to Saladin in Syria on May 26. With demands to withdraw his Muslim forces from Palestina and to return the True Cross to the Church of the Holy Sepulchre.
  • May – Saladin besieges the Hospitaller fortress of Krak des Chevaliers, in Syria. Seeing that the castle is too well defended, instead he decides to march on the Castle of Margat, which he also fails to capture.
  • July – Saladin marches through the Buqaia, and occupies Jabala and Lattakieh. From Lattakieh he turns inland and, after a few days of fierce fighting, takes Sahyun Castle (called Castle of Saladin) on July 29.

1189 CE44 entries

  • August – Byzantine Emperor Isaac II Angelos denies any crusader access and begins to hinder the German forces who try to cross his frontier. Frederick I progresses with force, by capturing Philippopolis and defeats a Byzantine army (some 3,000 men) that attempts to recapture the city. The Germans are delayed for six months in Thrace.
  • November 11 – King William II of Sicily ("the Good"), having made peace with Emperor Isaac II and abandoned Thessalonika and other conquests, dies childless at Palermo. The Sicilian nobles elect Tancred of Lecce (illegitimate son of Roger II) as the new ruler of Sicily, instead of Princess Constance and her husband Henry VI, to avoid German rule.
  • December 5 – King William I ("the Lion") of Scotland gives Richard I 10,000 marks to buy his kingdom's independence. This overturns the Treaty of Falaise which William had to sign when he was captured in 1174.