I recently watched RRR, an Indian film that takes place during English colonialism in India. Not surprisingly, the bad guys are the English. RRR is one of many Indian movies to feature English characters as pretty one-dimensional bad guys that the heroes have to fight. And I want to clarify that these aren't bad guys that happen to be English or portrayed by English actors. Our heroes are fighting the British Empire itself, and the baddies are an extension of that.
Similarly, American movies that take place in different time periods face similar foes. Revolutionary War movies also face off against the British Empire. WWII movies face off against Nazis. Cold War era movies face off against Russians/Soviets.
But what are some movies where Americans are the bad guys?
Edit: Lot of comments mentioning films that feature American protagonists who do morally questionable things. I was more asking about films where some other nationality are the heroes and the Americans are the bad guy, antagonist, stock characters.