Operation Iraqi Freedom is officially concluded, and the advise and assist mission continues under Operation New Dawn.[11] 49,700 U.S. troops in Iraq.[1] 31 December 2011 – American 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.[12]