British Indian Ocean Territory

An Overseas Territory of the United Kingdom situated in the Indian Ocean, halfway between Tanzania and Indonesia. The territory comprises the seven atolls of the Chagos Archipelago with over 1,000 individual islands (many very small) amounting to a total land area of 60 square kilometres (23 square miles). The largest and most southerly island is Diego Garcia, 27 square kilometres (10 square miles), the site of a Joint Military Facility of the United Kingdom and the United States.

"The only inhabitants in British Indian Ocean Territory are British and United States military personnel, and associated contractors, who collectively number around 3,000 as of 2018."