The History of al-Ṭabarī Vol. 28

The initial years (126-145) of al-Manṣūr's reign presented several significant challenges to nascent ʿAbbāsid hegemony, and the resulting confrontations constitute the central focus of this section of Ṭabarī's Tarikh. After Abu Jafar succeeded his brother Abū Al-ʿabbās as caliph, the second of the ʿAbbāsid dynasty, he moved against his recalcitrant uncle, ʿAbd Allāh ibn ʿAlī, and against the potential threat that he perceived in the person of the commander in Khurasan, Abu Muslim. Eliminating th