Marines with Company B, Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, exit an amphibious assault vehicle and begin to secure the beach on Feb. 10, 2012. The assault was a multilateral exercise that included Royal Thai, Republic of Korea and U.S. Marines, and was conducted during Exercise Cobra Gold 2012. Cobra Gold 2012 demonstrates the resolve of the U.S. and participating nations to increase interoperability and promote security and peace throughout the Asia-Pacific region.