902

By place

Europe

• Spring - Adalbert II, margrave of Tuscany, revolts against Emperor Louis III. He helps the deposed King Berengar I to recover the Kingdom of Italy. Louis III is forced to abdicate the Lombard throne and flees to Provence, compelled to promise never to return to Italy.
• February – March - Abu Abbas Abdallah, conqueror of Reggio Calabria, returns from Sicily and succeeds his father Ibrahim II as Aghlabid emir of Ifriqiya.
• June - Ibrahim II lands with an Aghlabid expeditionary force in Trapani and proceeds to Palermo. He crushes the reinforced Byzantine army at Giardini.
• August 1 - Taormina, the last Byzantine stronghold in Sicily, is captured by the Aghlabid army. After nearly 75 years, all of Sicily is in Aghlabid hands.
• September - Ibrahim II crosses the Strait of Messina into Calabria. He begin his march to conquer the rest of Italy and lays siege at Cosenza.
• October 23 - Ibrahim II dies of dysentery in a chapel near Cosenza. His grandson, Ziyadat Allah, takes over the army, but lifts the siege.
• Winter - The Balearic Islands are conquered by the Emirate of Córdoba. The Moors improve agriculture with irrigation on the islands.

  Britain

• December 13 - Battle of the Holme: The Anglo-Saxon army is defeated by the Danish Vikings under Æthelwold at Holme. Æthelwold is killed, ending his revolt against King Edward the Elder.
• Winter - The Norsemen are expelled from Dublin. After a brief foray into Seisyllwg, a group, under the Viking lord Ingimundr, settle in the Wirral with the agreement of Lady Æthelflæd of the Mercians.

  Arabian Empire

• April 5 - Caliph Al-Mu'tadid dies in Baghdad after a 10-year reign. He has been possibly poisoned in a palace intrigue, and is succeeded by his eldest son Al-Muktafi as ruler of the Abbasid Caliphate.
• The Kutama tribe under Abu Abdallah al-Shi'i revolt against the Aghlabids. He begins a campaign and dispatches an invitation to the Fatimid spiritual leader Ubayd Allah al-Mahdi Billah to support him.
• Moorish Andalusian merchants set up a trade settlement in Oran.

  Asia

• Spring - Emperor Zhao Zong appoints Yang Xingmi as the overall commander of the Eastern circuits in China. He receives the title of Prince Wuzhong of Wu.
• The Kingdom of Nanzhao in East Asia is overthrown, followed by three dynasties in quick succession, before the establishment of the Kingdom of Dali in 937.