Not many people know about Diego Garcia, the only military base for the US and UK government in the Indian Ocean. This article gave me a better insight of the island's history, and Mauritius' struggle to redeem Diego Garcia (it used to be part of Mauritius).

Quoted: Diego Garcia’s strategic location made it an ideal location for the US and British governments to establish a military base from where they could militarily intervene in Africa, the Middle East and Asia. In defiance of many United Nations, Organisation of African Unity and Non-Aligned Movement resolutions, London leased the Chagos, including Diego Garcia, to Washington, supposedly as the site for a “communications base”. The US has spent billions to construct a massive land-based “aircraft carrier” on Diego Garcia.
It was from Diego Garcia that the US launched B-52, B-1 and B-2 bombers to pulverise Afghanistan in 2001 and Iraq in 2003.
The US almost certainly stores nuclear weapons on the atoll, violating the UN’s 1971 Indian Ocean Zone of Peace resolution. In 1995, a UN treaty for a nuclear-weapons’ free Africa was agreed to by all the countries concerned. However, at the insistence of Washington and London, the treaty contains “dotted lines” around Diego Garcia, excluding it from the treaty’s provisions.