U.S. and Thai Marines storm the beachhead in an amphibious assault raid during Cobra Gold. U.S. and Thai Marines storm the beachhead in an amphibious assault raid during Cobra Gold, an annual exercise, in Hat Yao, Thailand, on Feb. 10, 2011. Cobra Gold is a multinational training exercise designed to improve partner nation interoperability. The Marines are assigned to the Battalion Landing Team, 2nd Battalion, 5th Marine Regiment, 31st Marine Expeditionary Unit. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 052394-S-PRA39-334.jpg Photo Gallery