The US base on Diego Garcia is an exceptionally nasty bit of history: with the British murdering all the local islanders pet dogs - literally grabbing them from the arms of screaming children and telling them they were next - as part of an intimidation campaign to force them off the island so the US could have it’s intelligence outpost.
For those curious about this history, you can watch John Pilger’s 2004 documentary Stealing a Nation for free on his website: https://johnpilger.com/stealing-a-nation/