Battle of the Zab

Greater Zab River Map in Iraq

Date	January 25, 750
Location	near the Great Zab
Result	Decisive Abbasid victory Collapse and End of the Umayyad Caliphate with rise of the new dynasty the Abbasids

Belligerents

Abbasid Caliphate

Umayyad Caliphate

Commanders and leaders

Abdallah ibn Ali

Marwan II

Strength

35,000^[1]

120,000 or 150,000^[2]

Civil wars of the early Caliphates

Ridda wars First Fitna Second Fitna Revolt of Ibn al-Ash'ath Revolt of Yazid ibn al-Muhallab Revolt of Harith ibn Surayj Zaydi Revolt Berber Revolt Third Fitna Abbasid Revolution Alid Revolt (762–763) Alid Revolt (786) Qaysi–Yamani war Fourth Fitna Anarchy at Samarra Kharijite Rebellions

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.

Background

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 armies

In 750, the army of the Umayyad caliph Marwan II fought a combined force of Abbasid, Shia, and Persian soldiers at the Zab. 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 battle

The Abbasid army formed a spear wall, a tactic they had adopted from their Syrian 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.

Aftermath

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.

References

↑ Al Bidayah wa-Nihayah of Tarikh ibn Kathir)
↑ 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

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