 In 912, opposition to the Samanid governor of Sistan Abu Salih Mansur resulted in a revolt.As he was the only surviving member of the Saffarids descended from Ya'qub ibn Layth al-Saffar still in Sistan, the ten-year-old ‘Amr was made the figurehead of the movement.Chief among the leaders of the revolt was Muhammad ibn Hurmuz, a former Kharijite and Samanid soldier, who enlisted the support of the "‘ayyarun", imprisoned Abu Salih Mansur and wrested control of Zarang from the Samanids.