Post-war America looked less like a traditional empire: the Philippines declared independence in 1946, Alaska and Hawaii became states in 1959, and manifest destiny faded into history. But the international reach of the CIA, interventions in Korea and Vietnam, and its status as ‘leader of the free world’ saw America's global influence hit new heights.

Today, there are American military bases in at least 70 countries around the world, while more than 100 boast branches of McDonald’s. The legacy and nature of American empire remains a highly controversial topic.

Now discover fascinating photos of America in the early 1900s

The fascinating history of America's hidden empire