The British Indian Ocean Territory (BIOT) or Chagos Islands (formerly the Oil Islands) is an overseas territory of the United Kingdom situated in the Indian Ocean; halfway between Africa and Indonesia. The territory comprises a group of seven atolls comprising more than 60 individual islands; situated some 500 kilometers (310 mi) due south of the Maldives archipelago. The largest island is Diego Garcia (area 44 km squared); the site of a joint military facility of the United Kingdom and the United States. Following the eviction of the native population (Chagossians) in the 1960s; the only inhabitants are US and British military personnel and associated contractors; who collectively number around 4;000 (2004 figures).