Marines with the 15th Marine Expeditionary Unit warm up before training during Corporals' Course aboard the USS Green Bay, Feb. 26. Corporals' Course is professional military education for enlisted Marines designed to give them the tools to become effective small unit leaders. The 15th MEU is deployed as part of the Peleliu Amphibious Ready Group as a U.S. Central Command theater reserve force, providing support for maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility. (U.S. Marine Corps photo by Cpl. Bobby J. Gonzalez/Released)