US, Asian military forces hold annual 'Cobra Gold' exercise The US and Thailand hold the annual joint 'Cobra Gold', the largest US-led military exercises in Asia involving gruelling drills in the Thai jungle, war games, humanitarian assistance and disaster relief exercise. This year's 11-day exercise is the 38th edition which sees 4500 U.S. personnel participate directly in the exercise. IMAGES AND SOUNDBITES++REFILE WITH THE TEXT STORY++