aug 15, 838 - Sack of Amorium

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The Sack of Amorium by the Abbasid Caliphate in mid-August 838 was one of the major events in the long history of the Arab–Byzantine Wars. The Abbasid campaign was led personally by the Caliph al-Mu'tasim (reigned 833–842), in retaliation to a virtually unopposed expedition launched by the Byzantine emperor Theophilos (r. 829–842) into the Caliphate's borderlands the previous year. Mu'tasim targeted Amorium, a Byzantine city in western Asia Minor (modern Anatolia), because it was the birthplace of the ruling Byzantine dynasty and, at the time, one of Byzantium's largest and most important cities.

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