Siege of Baghdad (812–813)

Siege of Baghdad (812813)
Part of the Fourth Fitna

Baghdad in the late 8th/early 9th centuries
DateAugust 812 28 September 813
Location
Result Decisive victory of Al-Ma'mun's forces
Belligerents
Al-Amin's forces Al-Ma'mun's forces
Commanders and leaders
Al Amin 
Muhammad ibn Yazid al-Muhallabi
al-Samarqandi
Abd al-Rahman ibn Jabala 
Tahir ibn Husayn
Harthama ibn A'yan
Zuhayr ibn al-Musayyab al-Dabbi
Casualties and losses
High 30,000 soldiers killed

The siege of Baghdad was a part of a civil war between al-Amin and al-Ma'mun for the Abbasid Caliphate of Baghdad. The siege lasted from August 812 until September 813. The siege is described in great detail by Muhammad ibn Jarir al-Tabari in his famous History of the Prophets and Kings.