The Trump administration has publicly rebuked British Conservative Party leader Kemi Badenoch for claiming that Nigel Farage has said he would give away the British Indian Ocean Territory, or Chagos Islands, to the U.S. What Farage did say is that he would give the U.S. the use of the islands, Diego Garcia, in “perpetuity.” But why is the British-American military base on the island so important, and why are the British government’s moves to surrender sovereignty over Chagos to Mauritius such a source of geopolitical tension?
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What Are the Chagos Islands?
The Chagos Islands are a group of over 60 islands in the Indian Ocean, about 1,000 miles southwest of the Indian Subcontinent. The United Kingdom captured them from Napoleonic France in 1814, and has administered them as the British Indian Ocean Territory since 1965. Mauritius, an island nation off East Africa over a thousand nautical miles from the Chagos Islands, has advanced a rival, fraudulent sovereignty claim for decades.
In the 1960s, the British government removed the resident population, who were the descendants of plantation laborers brought over by British and French colonists rather than indigenous people, to construct a permanent joint military base with the United States on the island of Diego Garcia. These Chagossian exiles, who wish to return to the archipelago, are near-universally opposed to their being transferred to Mauritius.
What Is Diego Garcia?
Diego Garcia is the largest and southernmost island in the archipelago. Since the early 1970s, the island has hosted a joint British-American military base. The base has control towers, hangars, radar installations, fuel storage facilities, desalination plants, and a 12,000-foot concrete runway capable of handling heavy strategic bombers, as well as aircraft used for refueling, reconnaissance, and transportation. The base also has a deepwater port that can handle large naval vessels and submarines.
Most importantly, Diego Garcia hosts approximately 4,000 U.S. and British military servicemen, support staff, and civilian contractors. The island has no permanent civilian population.
Since its creation, the base, officially called the Permanent Joint Operating Base Diego Garcia, has supported American and British military operations across the Indian Ocean, the Middle East, and the wider Indo-Pacific.
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Why Chaos Matters to America.
The military base at Diego Garcia provides the United States with a strategically important military position between Africa, the Middle East, and Asia. Its isolated location also provides a secure base for long-range aircraft, naval forces, surveillance, and logistics. Back in March, the United States deployed six stealth bombers to Diego Garcia amid the country’s ongoing campaign against the Houthis, a Yemen-based terrorist organization backed by the Islamic Republic of Iran.
Mauritius is allied with People’s Republic China, having elevated their relationship to a “strategic partnership” in 2024 and entered into a bilateral free trade agreement in 2019. China has supported Mauritius’ fraudulent claim to the Chagos Islands in exchange for adhering to the “One China” policy, which recognizes the Chinese Communist Party regime as the sole legitimate rulers of China, including Taiwan.
Britain’s Decision.
In May 2025, under former British Prime Minister Sir Keir Starmer, Britain signed a treaty to surrender sovereignty over the Chagos Islands, including Diego Garcia, to Mauritius. Under the treaty, the United Kingdom would retain rights to operate the base for an initial 99-year period and pay Mauritius an average of £101 million (~$132,000,000) annually for the privilege.
The treaty sparked widespread criticism, including from President Donald J. Trump. “I don’t support it. It’s terrible. It was a terrible deal. All of a sudden [Mauritius] say they have ownership… after decades and centuries, I think it’s ridiculous. No. We were talking about that. It’s strategically very important. Very important… It’s amazing how strategic it is, and I think the Prime Minister’s going to be looking at it,” said the President last month to reporters at the United Nations General Assembly, during his first meeting with incumbent Prime Minister Andy Burnham.
As a result of U.S. opposition, Britain paused ratification of the treaty earlier this year. Following the resignation of Starmer, as well as former Attorney General Lord Hermer, the chief architect of the treaty, the deal has been in limbo. Trump and Farage, who has lobbied the White House extensively on Chagos, have used their respective influence to delay the deal and prevent the region from falling under the influence of China.
Crucially, even if the lease were to maintain basing rights, it would not prevent Mauritius from leasing another of the Chagos islands to China or another adversary state, drastically undermining its privacy and security.
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