Gen. Robert B. Neller, the 37th and new Commandant of the Marine Corps, speaks during his passage of command ceremony at Marine Corps Barracks Washington, D.C., Sept. 24, 2015. Gen. Dunford relinquished the position to Gen. Robert B. Neller after being confirmed to succeed U.S. Army Gen. Martin Dempsey as Chairman of the Joint Chiefs of Staff. - Gen. Robert B. Neller, the 37th and new Commandant of the Marine Corps, speaks during his passage of command ceremony at Marine Corps Barracks Washington, D.C., Sept. 24, 2015. Gen. Dunford relinquished the position to Gen. Robert B. Neller after being confirmed to succeed U.S. Army Gen. Martin Dempsey as Chairman of the Joint Chiefs of Staff.