 Multinational Force – Iraq replaced the previous force, Combined Joint Task Force 7, on 15 May 2004, and was later itself reorganized into its successor, United States Forces – Iraq, on 1 January 2010.In March 2010, a detention center at Camp Taji, which opened in 2008, was transferred to Iraq with 2,900 detained ex-insurgents.As of May 2011, all non-U.S. coalition members had withdrawn from Iraq, with the U.S. military withdrawing from the country on December 18, 2011.