This article was originally published on South Asian Voices, a publication of the Stimson Center.

“Do not give away Diego Garcia,” warned U.S. President Donald Trump on February 19, as the United Kingdom moved forward with plans to transfer sovereignty of the Chagos Archipelago to Mauritius. While the Chagos Archipelago has often been viewed through the prism of the sovereignty dispute between the United Kingdom and Mauritius, the islands today serve as a fulcrum for regional rivalries and great-power competition.