Proper noun
British Indian Ocean Territory
An archipelago and overseas territory of the United Kingdom in the middle of the Indian Ocean between Africa and Indonesia; created in 1965; currently used as a joint US/UK military base.
It was one of the "Dependencies" of the British Colony of Mauritius until it was detached for inclusion in the newly created British Indian Ocean Territory (BIOT) in 1965. Source: Internet
Thus, since the late Fifties, the way was paved for independence. citation Later in 1965, after the Lancaster Conference, the Chagos Archipelago was excised from the territory of Mauritius to form the British Indian Ocean Territory (BIOT). Source: Internet