Abu'l-Wafa Tuzun was a Turkish soldier who served first the Iranian ruler Mardavij ibn Ziyar and subsequently the Abbasid Caliphate. Rising to a position of leadership in the Abbasid army, he evicted the Hamdanid Nasir al-Dawla from Baghdad and assumed the position of amir al-umara on 31 May 943, becoming the Caliphate's de facto ruler. He held this position until his death in August 945, a few months before Baghdad, and the Abbasid Caliphate with it, came under the control of the Buyids.