وقعة الزاب

In 132 AH Marwan ibn Muhammad was defeated at al-Zab, and he was killed after the defeat. ^{1 2}

al-Suyuti says that the Banu al-Abbas rose against Marwan, led by Abd Allah ibn Ali, uncle of al-Saffah. The two hosts met near Mosul, Marwan was broken and returned to Syria. ³

al-Mas'udi relates that Marwan camped at the Lesser Zab and set up a bridge over it. Abd Allah ibn Ali came to him with the armies of the people of Khurasan two nights before the end of Jumada al-Akhira 132 AH. Marwan was defeated on Saturday, eleven nights into that month, and three hundred men of the Umayyads drowned, among them Ibrahim ibn al-Walid, the deposed. ⁴