Abu Salama al-Khallal

Abu Salama Hafs ibn Sulayman al-Khallal was an anti-Umayyad missionary and one of the principal leaders of the Hashimiyya movement, that launched the Abbasid Revolution. During September–November 749 he was the de facto ruler of Kufa and of the movement, and tried to install an Alid as caliph at the head of the Revolution. His efforts failed, and the Khurasani army instead recognized the Abbasid al-Saffah as caliph. He remained in office, but was assassinated by the Abbasids shortly after due to his pro-Alid leanings.