In 1965, three years before Mauritius became independent, the UK split off the Chagos Archipelago from Mauritian territory, and also split off the islands of Aldabra, Farquhar, and Desroches from the Seychelles, to form the British Indian Ocean Territory (BIOT). The local population was forcibly expelled and the largest island, Diego Garcia, was leased to the United States. The UK has restricted access to the Chagos Archipelago, barring entry to casual tourists, the media, and former inhabitants. The sovereignty of the Chagos is disputed between Mauritius and the UK. In February 2019, the International Court of Justice issued an advisory opinion ordering the UK to return the Chagos Islands to Mauritius as rapidly as possible to complete the decolonisation of Mauritius.