The treaty signed by Britain and Mauritius on May 22, 2025 provides for Mauritian sovereignty over the Chagos archipelago, with British rights over the Diego Garcia military base for an initial 99-year period, according to Al Jazeera.

The deal has yet to enter into force amid opposition from US President Donald Trump and a legislative stall in Britain. Between 1968 and 1973, Britain removed an estimated 1,400 to 1,700 Chagossians from the islands.