The British Indian Ocean Territory (BIOT) is a remote archipelago in the central Indian Ocean, about 1,600 kilometres south of India. It consists of the Chagos Archipelago — around 55 islands spread across six atolls — covering a vast area of ocean. The total land area is tiny, around 60 square kilometres, but the territory oversees one of the world's largest marine protected areas.
The only inhabited island is Diego Garcia, home to a major joint US-UK military installation. The base has been strategically important since it was established in the 1970s, providing a deep-water anchorage and long airstrip within range of the Middle East, South Asia, and East Africa. Access to Diego Garcia is strictly controlled: only military personnel, civilian contractors, and a small number of authorized workers may live or work there. There are no tourist facilities and no civilian public access.
The human history of the archipelago carries a painful legacy. The Chagossian people, whose ancestors had lived on the islands for generations, were forcibly displaced between 1968 and 1973 to make way for the military base, primarily to Mauritius and the Seychelles. Their right of return has been the subject of ongoing legal and diplomatic dispute for decades.
Yachters and divers occasionally visit the outer uninhabited atolls of the Chagos — Peros Banhos, Salomon, and Egmont — under permit. The reefs are among the most pristine in the Indian Ocean, largely untouched since the removal of the resident population.