Sack of Amorium

Overview

The siege 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, in retaliation to a virtually unopposed expedition launched by the Byzantine emperor Theophilos into the Caliphate's borderlands the previous year. Mu'tasim targeted Amorium, an Eastern Roman city in western Asia Minor, because it was the birthplace of the ruling Byzantine dynasty and, at the time, one of Byzantium's largest and most important cities. The caliph gathered an exceptionally large army, which he divided in two parts, which invaded from the northeast and the south. The northeastern army defeated the Byzantine forces under Theophilos at Anzen, allowing the Abbasids to penetrate deep into Byzantine Asia Minor and converge upon Ancyra, which they found abandoned. After sacking the city, they turned south to Amorium, where they arrived on 1 August. Faced with intrigues at Constantinople and the rebellion of the large Khurramite contingent of his army, Theophilos was unable to aid the city.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Abbasid siege and sack of Amorium in August 838 was one of the most consequential Abbasid military successes of the Arab–Byzantine Wars. Caliph al-Mu'tasim selected Amorium deliberately: it was the birthplace of the reigning Byzantine dynasty and one of the largest and most important cities in Byzantine Asia Minor, making its fall a direct symbolic and material blow to imperial prestige. The campaign was itself a retaliatory response to a Byzantine expedition into Abbasid borderlands the previous year, and al-Mu'tasim prosecuted it at the head of a force roughly twice the size of what Theophilos could field. The defeat of the Byzantine emperor at Anzen allowed Abbasid columns to penetrate deep into Asia Minor, take Ancyra unopposed, and converge on Amorium — a sequence that exposed the limits of Byzantine defensive capacity in the east. Byzantine casualties recorded between 30,000 and 70,000 underline the scale of the disaster. Theophilos was unable to relieve the city due to the rebellion of his Khurramite contingent and political intrigues at Constantinople, compounding the military failure with a demonstration of internal instability. The fall of the dynasty's home city carried lasting resonance within the long conflict between the Abbasid Caliphate and Byzantium.

Tactics

Forces & casualties

Commanders (7)