The U.K. has agreed to hand sovereignty of the long-contested Chagos Islands, an archipelago of more than 60 islands in the Indian Ocean, to Mauritius, in a deal to secure the future of a strategically important U.

Britain said on Thursday it would cede sovereignty of the Chagos Islands to Mauritius in a deal it said secured the future of the UK-U.S. Diego Garcia military base, and which could also pave the way for people displaced decades ago to return home.

Britain struck a deal to cede sovereignty over the Chagos Islands in the Indian Ocean to Mauritius, while keeping control of a strategically important UK-US military base for another century.Under the agreement,