Question: who was hajjaj bin yousaf?
Answer: 685–705), who successively promoted him as the head of the caliph's shurta (security forces), the governor of the Hejaz (western Arabia) in 692–694, and the practical viceroy of a unified Iraqi province and the eastern parts of the Caliphate in 694. ... As governor of Iraq and the east, al-Hajjaj instituted key reforms.