Mustafa Barzani
During World War II, the power vacuum in Iraq was exploited by the Kurdish tribes and under the leadership of Mustafa Barzani a rebellion broke out in the north, effectively gaining control of Kurdish areas until 1945, when Iraqis could once again subdue the Kurds with British support. Under pressure from the Iraqi government and the British, the most influential leader of the clan, Mustafa Barzani was forced into exile in Iran in 1945. Later he moved to the Soviet Union after the collapse of the Republic of Mahabad in 1946.