The United Kingdom has announced it will return sovereignty over the Chagos Islands to Mauritius after nearly six decades of British rule. The archipelago, located in the Indian Ocean, is home to a contested military base on the island of Diego Garcia controlled by the U.K. and leased to the U.S. military. As part of the agreement announced today, the base will remain under U.K. and U.S. control for at least the next 99 years. In the 1960s and ’70s, the U.K. expelled most Chagos Islands inhabitants to make way for the air base, which Human Rights Watch has called a “crime against humanity.” Chagossians seeking to return to their ancestral territory are calling on the Biden administration to apologize and to make reparations.