U.S. Marine Corps, Republic of Korea Marines Corps, New Zealand Army and Australian Army conduct amphibious assault training at Doksukri Beach, South Korea, March 12, 2016, during Exercise Ssang Yong 16. Ssang Yong 16 is a biennial military exercise focused on strengthening the amphibious landing capabilities of the U.S. and its allies. - U.S. Marine Corps, Republic of Korea Marines Corps, New Zealand Army and Australian Army conduct amphibious assault training at Doksukri Beach, South Korea, March 12, 2016, during Exercise Ssang Yong 16. Ssang Yong 16 is a biennial military exercise focused on strengthening the amphibious landing capabilities of the U.S. and its allies.