A combined force comprising U.S. Marines, Royal New Zealand soldiers, Republic of Korea Marines, and Australian Marines conduct an amphibious landing drill on the beaches of Pohang, South Korea, March 11, 2016.

The amphibious landing is part of the largest-ever joint US/ROK military drill: Exercise Ssang Yong 2016.

Exercise Ssang Yong is a biennial military exercise focused on strengthening the amphibious landing capabilities of the ROK, the U.S., New Zealand and Australia.