How America became a superpower

"How America became a superpower on appsandmovies.com" – "America grew from a colony to a superpower in 200 years. "With over 800 military bases around the globe, the US is easily the most powerful nation on earth. But it wasn't always this way. The US once played an insignificant role in global affairs. In this 8-minute video, you can see the transformation" (Vox).