Royal Thai Marines, along with US infantry Marines with the Battalion Landing Team, 2nd Battalion, 5th Marine Regiment, 31st Marine Expeditionary Unit, 3rd Marine Expeditionary Brigade Forward, III Marine Expeditionary Force, assault the beachhead in an amphibious assault raid here Feb. 10, 2011 during Exercise Cobra Gold 2011. Cobra Gold 2011 is a regularly scheduled multinational training exercise designed to improve partner nation interoperability.