Pentagon Report: Diego Garcia Is Now Key US Base

Diego Garcia, the remote atoll at the heart of a long-running sovereignty dispute between Mauritius and the United Kingdom, has been officially designated as a key rear support base for the United States military, according to a newly released Pentagon report. The report, issued by the US Department of Defense, underscores the growing strategic importance of the Indian Ocean territory — a significance that adds yet another layer of complexity to the already sensitive Chagos Islands negotiations between Port Louis, London, and Washington. For decades, Diego Garcia has hosted a joint US-UK military installation, enabling American power projection across the Indo-Pacific, the Middle East, and East Africa. The Pentagon's formal acknowledgment of the base's rear-support role signals that Washington views the facility not merely as a legacy Cold War asset, but as an indispensable component of its modern military architecture. This development carries significant implications for Mauritius, which has long asserted sovereignty over the Chagos Archipelago — a claim validated by a 2019 International Court of Justice advisory opinion and a subsequent United Nations General Assembly resolution. Negotiations over the return of the islands have been ongoing, with the UK and Mauritius reaching a preliminary agreement in principle in 2024, though final terms remain under discussion amid reported pressure from Washington to preserve its military access. The Pentagon report's framing of Diego Garcia as a "key rear base" rather than a frontline installation may be strategically deliberate — suggesting the US is positioning the site as a logistics and support hub capable of sustaining prolonged operations across multiple theatres simultaneously. For Mauritius, the report is a double-edged signal. On one hand, it reaffirms how geopolitically valuable Chagos is — leverage that Port Louis could use in final negotiations to secure stronger terms, financial compensation, and binding guarantees. On the other hand, it makes clear that any sovereignty arrangement will almost certainly require Mauritius to accommodate long-term US military presence on the atoll. As global tensions rise in the Indo-Pacific, Diego Garcia's role is only set to grow — making the resolution of Mauritius's sovereignty claim one of the most consequential diplomatic outcomes in the region's near future.