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Battle of the Zab

The Battle of the Zab (Arabic: معركة الزاب‎) took place on the banks of the Great Zab river in what is now Iraq on January 25, 750. It spelled the end of the Umayyad Caliphate and the rise of the Abbasids, a dynasty that would last (under various influences and with varying power) until the 13th century.

Battle of the Zab
Part of the Abbasid Revolution
Zab rivers.PNG
Greater Zab River Map in Iraq
DateJanuary 25, 750
near the Great Zab
Result Decisive Abbasid victory
Collapse and End of the Umayyad Caliphate with rise of the new dynasty the Abbasids
Abbasid Caliphate Umayyad Caliphate
Commanders and leaders
Abu Muslim[1]
Abdallah ibn Ali
Abu Awn
Marwan II (WIA)
35,000[2] 120,000 or 150,000[3]


In 747 a major rebellion broke out against the Umayyad Caliphate, which ruled most of the Middle East from 661 to 750. The principal cause of the rebellion was the increasing gap between the outlying peoples of the Caliphate and the Damascus-based Umayyad government. The Umayyad-appointed governors of the Caliphate's various provinces were corrupt and interested only with personal gains. Additionally, the Umayyads claimed no direct descent from Muhammad, while the Abbasids did (they descended from Muhammad's uncle Abbas—a fact the latter used greatly during the revolution).

The armiesEdit

In 750, the army of the Umayyad caliph Marwan II fought a combined force of Abbasid, Shia, Khawarij, and Iraqi forces. Marwan's army was, on paper at least, far larger and more formidable than that of his opponents, as it contained many veterans of earlier Umayyad campaigns against the Byzantine Empire; its support for the caliph, however, was only lukewarm. The morale of the Umayyads had been damaged by the series of defeats inflicted earlier in the rebellion, while the morale of the Abbasid armies had increased.

The battleEdit

The Abbasid army formed a spear wall, a tactic they had adopted from their Umayyad opponents, presumably from witnessing it in earlier battles. This entailed standing in a battle line with their lances pointed at the enemy (similar to the stakes used by English longbowmen at Agincourt and Crécy many centuries later). The Umayyad cavalry charged, possibly believing that with their experience they could break the spear wall. This was a mistake on their part, however, and they were all but butchered. The Umayyad army fell into retreat, its morale finally shattered. Many were cut down by the zealous Abbasids or were drowned in the wintertime River Zab.


Marwan himself escaped the battlefield and fled down the Levant, pursued relentlessly by the Abbasids, who met no serious resistance from the Syrians because the land had recently been laid waste by an earthquake and pestilence. Marwan fled at last to Abusir/Busir, which is a small town on the Egyptian Nile delta. It was there, a few months after the battle, that he was at last killed in a short battle and replaced as caliph by Abu al-Abbas as-Saffah, bringing to an end Umayyad rule in the Middle East.



  1. ^ Universalis, Encyclopædia. "ABBASIDES". Encyclopædia Universalis (in French). Retrieved 2019-06-27. Abū Muslim déclencha l'opération en 747 et la victoire fut acquise à la bataille du Grand Zāb en 750. Ibrāhīm étant mort entre-temps, Abū Muslim proclama calife son frère Abū l-‘Abbās, dit as-Saffāḥ, en 749 à Kūfa.
  2. ^ Al Bidayah wa-Nihayah of Tarikh ibn Kathir)
  3. ^ Al Bidayah wa-Nihayah or Tarikh ibn Kathir).


  • "The Court of the Caliphs- when Baghdad ruled the Muslim world" by Hugh Kennedy

Coordinates: 35°59′28″N 43°20′37″E / 35.99111°N 43.34361°E / 35.99111; 43.34361