Military alliance

alliance between different states with the purpose to cooperate militarily

39 dated entries naming Military alliance, drawn from 39 separate years between 656 BCE and 965 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.

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7th century BC

656 BCEKing Shamash-shum-ukin of Babylon forms a secret alliance with Arabs, Aramaeans, Elamites, Persians, and Egyptians against his half brother Ashurbanipal.source
652 BCEElam withdraws from her alliance with king Shamash-shum-ukin of Babylon, who launches a premature attack on his half brother Ashurbanipal at year's end without waiting for reinforcements that have been promised by the Egyptian king Psamtik I.source

1st century BC

71 BCEMarcus Antonius is defeated by the Cretans, who have made an alliance with the pirates. He is compelled to concede a humiliating peace. Antonius dies in office the same year and is awarded, posthumously, with the cognomen Creticus.source
41 BCEMark Antony meets Cleopatra VII in Tarsus (Cilicia) and forms an alliance. He returns to Alexandria with her and they become lovers in the winter of 41–40 BC. To safeguard herself and Caesarion, she has Antony order the execution of her (half) sister Arsinoe IV, who is living at the temple of Artemis in Ephesus.source
36 BCEPublius Canidius Crassus invades Armenia and Iberia (Georgia); he forces Parnavaz II into an alliance against Zober, king of Albania.source

5th century

435Huneric, eldest son of Genseric, is sent as a child hostage to the court at Ravenna to secure the alliance with the Western Roman Empire.source
451Eudocia, daughter of Emperor Valentinian III, marries Huneric in Ravenna. The engagement serves to strengthen the alliance between the Western Roman Empire and the Vandal Kingdom.source
453Theodoric II succeeds his brother Thorismund as king of the Visigoths, Thorismund having been murdered after he violated the alliance with the Western Roman Empire.source
466Euric sends an embassy to the Eastern Roman Empire for recognition of the Visigoth sovereignty. He forms an alliance with the Suebi and the Vandals.source

6th century

566Emperor Justin II, facing an empty treasury, breaks the treaty with the Gepids that has existed since 565. King Alboin of the Lombards makes an alliance with the Avars under Bayan I, at the expense of tough conditions. They demand a tenth of the Lombards' cattle and half of the war booty.source
581Palace coup in Austrasia: New advisors break the peace treaty with King Guntram, and make a new alliance with his half brother Chilperic I, in which Childebert II, age 11, is recognized as Chilperic's heir.source
583King Liuvigild lays siege to Seville (Southern Spain), and forms an alliance with the Byzantines. He summons his rebellious son Hermenegild back to Toledo, and forces him to abandon the Chalcedonian Faith.source
596Battle of Raith: An invading force of Angles lands on the Fife coast near Raith (Kirkcaldy) and defeats an alliance of Scots, Britons and Picts, under King Áedán mac Gabráin of Dál Riata (Scotland).source

7th century

607Visigoths, Austrasians, Neustrians and Lombards form an alliance against King Theuderic II of Burgundy, whose grandmother and sister have murdered Theuderic's wife Ermenberga, daughter of Witteric, king of the Visigoths. Fighting takes place around Narbonne, but little is known of the details or outcome (approximate date).source
630King Penda of Mercia besieges Exeter in southwest England. King Cadwallon ap Cadfan of Gwynedd lands with a force nearby, and negotiates an alliance with Penda.source
635Emperor Heraclius makes an alliance with Kubrat, ruler (khagan) of Great Bulgaria, to break the power of the Avars on the Balkan Peninsula.source
637June 24 – Battle of Mag Rath: King Oswald of Northumbria sends troops to Ireland, to assist Domnall Brecc King of Dál Riata in his alliance with King Congal Cáech of Ulaid against Domnall mac Áedo High King of Ireland, during the Irish dynastic wars. Domnall Brecc, Congal and their forces are defeated near Moira. At the Mull of Kintyre (southwest Scotland), Domnall mac Áedo's fleet destroys Domnall Brecc's naval force of Dál Riata.source
660Baekje in southwestern Korea is conquered by an alliance of the Tang dynasty and Silla, led by general Su Dingfang and King Munmu of Silla. The Japanese envoys detained in Chang'an are paroled.source

8th century

718King Liutprand of the Lombards builds a close alliance with Charles Martel, and attacks the Bavarian castles on the River Adige, maintaining strategic control of the Alpine passes in the Italian Alps (approximate date).source
725Duke Eudes of Aquitaine seeks an alliance with Munuza, governor of Cerdagne (eastern Pyrenees), currently in rebellion against the central Umayyad government at Córdoba in Andalusia (probably not cemented until 729).source
730King Liutprand contracts an alliance with Eutychius, exarch of Ravenna, and agrees to support him in his attack on Rome, while subjugating the independent southern Lombard duchies of Benevento and Spoleto.source
731Ragenfrid, ex-mayor of the palace of Neustria, meets Duke Eudes of Aquitaine, to accept his rule and independence from the Frankish Kingdom. Fearing an alliance against him, Charles Martel exiles Ragenfrid's supporter Wandon of Fontenelle, and imprisons bishop Aimar of Auxerre.source
736Charles Martel, Merovingian mayor of the palace, forms local alliances with the Burgundians, and imposes Frankish domination on Provence. He defeats Muslim forces at Sernhac and Beaucaire in Septimania (Southern France).source
740Duke Thrasimund II recovers the duchy of Spoleto and kills Hilderic with Papal-Beneventian aid. He does not return the confiscated papal cities, and his alliance with Pope Gregory III ruptures.source
753Grifo, Frankish duke and illegitimate son of Charles Martel, rebels against King Pepin III ("the Short") (his half-brother), in alliance with the Bretons. He flees to Italy to join King Aistulf of the Lombards, but is caught and killed while passing the Alps.source
778Saxon Wars: Widukind and his close followers return to Saxony from Denmark. He probably makes alliances with the Danes and the northwestern Slav tribes. Saxon rebels destroy the fortress of Karlsburg and sack Deutz (near Cologne), but are unable to cross the Rhine. They are driven back by the garrison of Koblenz, but then ambush and defeat the Frankish pursuers. Counter-attacking Frankish forces pursue the Saxons up the Lahn Valley, and defeat them near Leisa.source
783October – Charlemagne marries Fastrada, the 18-year-old daughter of a Frankish count named Rudolph, and makes her his queen at Worms. The probable reason behind the marriage is to solidify a Frankish alliance east of the Rhine, against the Saxons in Lower Saxony (modern Germany).source
792Offa arranges coastal defences to fend off Viking attacks. He forms an alliance with Essex, Kent and Sussex, in an attempt to unify England (approximate date).source
798Battle of Bornhöved: King Charlemagne forms an alliance with the Obodrites. Together with Prince Drożko (Thrasco), he defeats the Nordalbian Saxons near the village of Bornhöved (modern-day Neumünster), obliging these 'northerners' to submit and give hostages against their future good behavior. In the coming years they are granted areas of present-day Hamburg.source

9th century

807The Vikings land on the Cornish coast, and form an alliance with the Cornish to fight against Wessex.source
808King Godfred of the Danes forms an alliance with the Wiltzi and other Wendic tribes, against the pagan but pro-Frankish Abodrites. Godfred builds earthworks (Danevirke) across the isthmus of Schleswig-Holstein, separating Jutland from the northern extent of the Frankish Empire.source
885Kings Hyfaidd of Dyfed, Elisedd of Brycheiniog and Hywel of Glywysing, being harassed by the armies of King Anarawd in Wales, seek the protection of Alfred the Great, and submit to his overlordship. Anarawd seeks an alliance with King Guthred of York.source
889Boris I, ruler (khan) of the Bulgarian Empire, abdicates the throne after a 37-year reign, and retires to a monastery. He is succeeded by his eldest son Vladimir, as monarch of Bulgaria. Vladimir falls under the influence of the old boyars; many remain anti-Christian and anti-Byzantine. He attempts to restore the former Frankish alliance, and to reestablish paganism.source
893Vladimir, ruler (khan) of the Bulgarian Empire, is dethroned by his father Boris I, with help from loyal boyars. He is blinded, and succeeded by his brother Simeon I, as prince of Bulgaria; the capital is moved from Pliska to Preslav. Simeon makes an alliance with the Pechenegs (or Patzinaks), a semi-nomad Turkic tribe from the Central Asian steppes.source
896Prince Klonimir, pretender to the throne of the Serbian Principality, is defeated by his ruling cousin, Petar. He is recognized as sole ruler of Serbia by Simeon I, resulting in a 20-year peace and alliance (approximate date).source
900Spring – Atenulf I, Lombard prince of Capua, conquers the Duchy of Benevento. He deposes Duke Radelchis II and unites the two southern Lombard duchies in Mezzogiorno (Southern Italy). The Byzantines offer a strategic alliance to Atenulf who directs a campaign against the Saracens. They establish themselves on the banks of the Garigliano River. From here, Arab warbands launch frequent raids in Campania.source

10th century

917Summer – Lady Æthelflæd of Mercia cements an alliance with King Constantine II of Scotland against Norse York. She captures the fortress at Derby (belonging to the Five Boroughs of the Danelaw), while her brother, King Edward the Elder, takes Towcester. Æthelflæd's armies also ravage Brycheiniog (Wales) in revenge for killing the Mercian abbot Ecbryht (see 916).source
942Fall – Hugh of Provence makes a truce with the Moors of Fraxinet, after hearing the news that a Swabian army is about to descend on Italy. He allows the Moors to attack the Alpine passes for his own political ends in his struggle with Berengar of Ivrea. The Byzantines cry foul and end their alliance with Hugh.source
965Boleslaus I (the Cruel), duke of Bohemia, expands his territory into the Polish territories of Upper Silesia and Lesser Poland. By occupying the city of Kraków, he controls important trade routes from Prague to Kiev and Lviv. Prince Mieszko I of Poland makes an alliance with Boleslaus and marries his daughter Dobrawa.source