Martin Edward Dempsey (born March 14, 1952), sometimes known as Marty Dempsey, is a retired United States Army general who served as the 18th Chairman of the Joint Chiefs of Staff from October 1, 2011 until September 25, 2015. He previously served as the 37th Chief of Staff of the Army from April 11, 2011, to September 7, 2011. Before that, he served as Commanding General, U.S. Army Training and Doctrine Command, from December 8, 2008, to April 11, 2011, as Acting Commander, U.S. Central Command, from March 24, 2008, to October 30, 2008, as Deputy Commander, U.S. Central Command, from August 2007 to March 23, 2008, and as Commanding General, Multi-National Security Transition Command – Iraq (MNSTC-I), from August 2005 to August 2007. Dempsey assumed his assignment as Chairman of the Joint