JUSMAGTHAI is the U.S. Security Assistance Organization (SAO) in Thailand, as well as the in country OPR for all U.S. bilateral and multilateral military exercises and operations conducted in Thailand. The Chief of JUSMAGTHAI is the U.S. Defense Representative (USDR) in Thailand. In addition to its military chain of command, JUSMAGTHAI is also responsible to the U.S. Ambassador to Thailand. Unlike most SAOs, JUSMAGTHAI has primary responsibility, or otherwise directly supports, a variety of missions. These include a robust Joint Combined bilateral Exercise Program (averaging over 40 exercises a year), one of the largest International Military Education and Training (IMET) programs in the world, Humanitarian Demining, and Counterdrug missions.