30 March 2026

Trump, Iran, and Diego Garcia: Inside the Fight Over a Remote Military Base

Mariel Ferragamo

In the central Indian Ocean, 1,000 miles south of the southern tip of India—and around 5,800 miles southeast of the United Kingdom (UK)—lies the Chagos Archipelago, a small group of roughly sixty islands designated as the British Indian Ocean Territory since 1965.

U.S. President Donald Trump has marked the cluster of islands as critical to U.S. foreign policy because of a joint U.S.-UK military base on the archipelago’s largest island, Diego Garcia. Since the Cold War era, the base has acted as a staging ground for deployments to the Middle East and East Africa, allowing the United States quicker access to these areas—which has become all the more important as the Trump administration plunges forward with the U.S. war with Iran.

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