U.S. Marine Corps Lt. Col. Keven Matthews, left, the commanding officer of Marine Rotational Force-Darwin, and Australian Army Brig. Gen. John Frewen, the commanding general of the 1st Brigade and the senior Australian Defense Force officer for Robertson Barracks, talk after Frewen spoke to U.S. Marines with Marine Rotational Force-Darwin about expectations for the rotation at Robertson Barracks in Darwin, Australia, April 11, 2014.