Multi-National Corps – Iraq and Multi-National Security Transition Command – Iraq merged into the unified command United States Forces – Iraq, reducing the total number of staff positions by 41%. Approximately 112,000 U.S. troops in Iraq. 7 March 2010Iraq held parliamentary elections, its second under its democratic constitution, and is seen as an important milestone for the young Iraqi political system; this leaves approximately 96,000 U.S. troops in Iraq. 1 September 2010American forces ceased all combat operations, i.e. patrolling, serving arrest warrants, route clearance, etc., and transitioned to a pure advise, train and assist role. Operation Iraqi Freedom is officially concluded, and the advise and assist mission continues under Operation New Dawn. 49,700 U.S. troops in Iraq. 31 December 2011American forces complete their withdrawal from Iraq, leaving no U.S. military forces in the country. All security responsibilities were then assumed by the Iraqi Armed Forces and other security agencies, including the Iraqi interior ministry. The Office of Security Cooperation within the United States Embassy in Baghdad took up the remaining DOD training, equipment sales, and follow-on support functions. References External links Iraq–United States relations Military units and formations of the Iraq War Commands of the United States Armed Forces Military units and formations established in 2010 Military units and formations disestablished in 2011