AD 749

Abbasid Revolution

Qahtaba defeats an Umayyad army at Jabalq and the Abbasid advance reaches Kufa

Qahtaba won the battle that opened Iraq — then vanished during a crossing of the Euphrates, before he could enter Kufa.

March 749, at Jabalq

In March 749, Qahtaba ibn Shabib's Abbasid revolutionary army attacked Amir ibn Dubara's Umayyad "army of armies" at Jabalq, in the district of Isfahan.

Qahtaba reportedly raised a copy of the Quran on a lance and invited the Syrian troops to accept its authority. They answered with abuse, and he ordered the attack.

The Umayyad army was routed, Amir ibn Dubara was killed, and Qahtaba's men captured extensive spoils from its camp.

Numbers the sources cannot agree on

Al-Tabari's narrative reports 50,000 sent with Ibn Dubara to Isfahan, then gives 100,000 or even 150,000 at the battle itself, and puts Qahtaba's own force at 20,000.

These are claims within a tradition shaped under Abbasid rule, not measurements. After Jabalq, Qahtaba was reinforced with a reported 15,000 recruited from Khurasani villages.

Kufa taken without its commander

Qahtaba advanced through Nihavand and western Iran toward Iraq, aiming to link up with the Abbasid revolutionary organization in Kufa.

In August 749 he crossed the Euphrates and successfully surprised the Iraqi governor Yazid ibn Hubayra — then disappeared during the fighting and apparently drowned. Abbasid forces occupied Kufa two days later, under his son Hasan.

Abu al-Abbas was not publicly proclaimed caliph there until late October 749.

Sources

Researched 23 Aug 2026 5 sources 3 audit passes

How this was checked

Researched from the web into a fact sheet, rewritten from that sheet, then audited against it by a different model. How the pipeline works →

What the sources leave uncertain

The slug combines two separate episodes: Jabalq in March 749 and the capture of Kufa after an August Euphrates battle.
Narrative sources disagree dramatically about army strength. Al-Tabari preserves figures of 50,000, 100,000, and 150,000 for Ibn Dubara’s forces; these should be reported as claims, not reliable counts.
Qahtaba’s death is described as mysterious or suspicious; drowning while crossing the Euphrates is the leading reconstruction, not absolute certainty.
The surviving accounts were shaped under Abbasid rule. Encyclopaedia Iranica warns that they tend to exaggerate Abbasid control, minimize other actors, and present the dynasty’s rise as preordained.