Chronograph Русский Open the atlasAtlas

Fourth Fitna: al-Amin against al-Ma'mun and the siege of Baghdad

Less than two years after Harun al-Rashid’s death his sons went to war over the succession: the caliph al-Amin in Baghdad removed his half-brother al-Ma'mun, governor of Khorasan, from the line of succession, and al-Ma'mun’s general Tahir ibn al-Husayn routed the caliph’s far larger army at Rayy in 811 and then besieged Baghdad for more than a year. The city fell in September 813 and al-Amin was put to death; al-Ma'mun entered his capital only in 819.

Date
January 811 – September 813month known · duration: ≈ 3 years
Place
Baghdadtoday: Baghdad, Iraq · Middle East and Egypt
Route
Merv → Rayy → Hamadan → Hulwan → Baghdad
Participants
Al-Amin, Al-Ma'mun, Abbasid Caliphate
Threads
Middle East and Egypt (6th–10th c.)
Also known as
Great Abbasid Civil War; Fourth Muslim Civil War; War between the brothers; Siege of Baghdad (812–813); Battle of Rayy (811); Война аль-Амина и аль-Мамуна; Осада Багдада (812–813)

The two brothers were born six months apart in 786–787. Al-Amin, son of the Abbasid princess Zubayda, was named first heir in 792, and al-Ma'mun, the elder but the son of a concubine from Badghis, second heir in 799. On the pilgrimage of 802 Harun fixed the arrangement at Mecca: al-Amin was to reign in Baghdad, while al-Ma'mun remained his heir and was to govern an enlarged and practically independent Khorasan — terms recorded at length by al-Tabari, though perhaps coloured later by al-Ma'mun’s apologists. Behind the brothers stood rival interests: the abna’, descendants of the Khorasani army settled in Baghdad, and the local elites of Khorasan. After Harun’s death in March 809 al-Amin recalled the army and treasury from the east; in November 810 he removed al-Ma'mun from the succession in favour of his own sons, and in January 811 he sent Ali ibn Isa ibn Mahan against Khorasan with an army that, by various estimates, numbered 40,000–50,000 men.

Al-Ma'mun’s only force — by various estimates 4,000 to 10,000 men under Tahir ibn al-Husayn — met Ali ibn Isa near Rayy in 811; Ali was killed and his army scattered. Tahir defeated a second army near Hamadan, reached Hulwan by the winter and in 812, reinforced by Harthama ibn A'yan, took Khuzistan, Basra, Kufa and al-Mada'in, while Egypt, the Hejaz and Mosul went over to al-Ma'mun. From August 812 Baghdad was under siege. Most of its people lived in unwalled suburbs, and the siege became more than a year of street fighting in which the poor of the city fought on for al-Amin, catapults on both sides — some mounted on boats on the Tigris — struck the civilian quarters, and famine set in; Hugh Kennedy called it ‘the nearest early Islamic history saw to an attempt at social revolution’. In September 813, after wealthy citizens cut the pontoon bridges over the Tigris, the besiegers broke in; al-Amin, trying to reach Harthama by boat, was captured and killed on Tahir’s orders.

The regicide shocked contemporaries: in the words of the historian Elton Daniel, for the first time an Abbasid ruler had been humiliated and put to death by rebellious subjects. Al-Ma'mun stayed in Merv, and Iraq fell into disorder — an Alid revolt at Kufa in 815, al-Ma'mun’s choice of the Alid Ali al-Rida as heir in 817 and the proclamation of his uncle Ibrahim ibn al-Mahdi as caliph in Baghdad — until he entered Baghdad in August 819 and abandoned the Alid succession. The war ruined the abna’ and the old Arab families that had served the dynasty; power passed to new men such as Tahir, whose descendants governed Khorasan for some fifty years, and to the Turkish slave soldiers of al-Ma'mun’s brother, the future al-Mu'tasim. Al-Mansur’s Round City was partly ruined in the siege and never recovered; after 813 its Golden Gate Palace was no longer used as the home of the caliphs.

Open in the interactive atlas

Connections

Causes and preconditions

  • Reign of Harun al-Rashidbetween 14 September and 17 September 786 – 24 March 809 · Middle East and EgyptHarun’s succession settlement of 802 divided the empire between his sons

Related events

Same participants

Same place

Meanwhile in the world

Other regions, within a year of this event

The same period

Sources

  1. Wikipedia (English): Fourth Fitna
  2. Wikipedia (English): Siege of Baghdad (812–813)
  3. Wikipedia (English): Al-Amin
  4. Wikipedia (English): History of Baghdad
  5. Wikipedia (Russian): Четвёртая фитна
  6. Wikipedia (Russian): Мухаммад аль-Амин
  7. The History of al-Ṭabarī. Vol. XXXI: The War between Brothers / trans. M. Fishbein. — Albany: State University of New York Press, 1992.
  8. Kennedy H. The Prophet and the Age of the Caliphates: The Islamic Near East from the Sixth to the Eleventh Century. — 2nd ed. — Harlow: Pearson Longman, 2004.
  9. Wikidata: Q3778593