. "Abbasid Caliphate" . . "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\u2013Byzantine Wars. The Abbasid campaign was led personally by the Caliph al-Mu'tasim (reigned 833\u2013842), in retaliation to a virtually unopposed expedition launched by the Byzantine emperor Theophilos (r. 829\u2013842) into the Caliphate's borderlands the previous year."@en . "80,000" . "Byzantine Empire" . . "Sack of Amorium"@en . . "ca. 40,000 in the field army, ca. 30,000 in Amorium" . . . . "30,000\u201370,000 military and civilian dead" . . "City taken and razed by theAbbasids" .