U.S. Marine Corps military policemen with the 3rd Law Enforcement Battalion, III Marine Expeditionary Force Headquarters Group build an expeditionary detention facility March 27, 2014, in Gwangyang, South Korea, in preparation for exercise Ssang Yong 2014. Ssang Yong is a combined U.S.-South Korean combat readiness and joint/combined interoperability exercise designed to advance South Korean command and control capabilities through amphibious operations.