(��δ February 18), March 20, 2003, the outbreak of the war in Iraq.

3 May 20, 2009, U.S. and British coalition forces launched military operations in Iraq without UN Security Council authorization to. April 9, U.S. troops invaded Baghdad. On May 1, U.S. President George W. Bush announced in Iraq end of major combat. July 13, the establishment of the Iraqi Interim Governing Council. December 13 near his hometown of Tikrit, Saddam Hussein was captured by the U.S. military.
"preemptive strike" strategy in the United States and the unilateralist tendencies caused internal division of the Atlantic Alliance, the United States and Europe, the United States and Russia contradiction highlights. But under the dual pressures of the post-war reconstruction in Iraq and the guerrilla war, the United States and Britain had to resort to the multilateral framework of the United Nations and put forward ahead of the timetable for the handover of power to the Iraqi side.