As a Platoon Leader in Vietnam his men killed as many as 500 civilians in response for losing a soldier and injuring another. He was charged with personally killing 22 civilians, given a life sentence then pardoned by the president after serving 3 days. A Warrant Officer helicopter pilot, Hugh Thompson, saw what was happening and landed in the middle of everything and stopped it. For his efforts a Senator wanted to courts martial him. Times were certainly different back then.
https://abcnews.go.com/US/wireStory/william-calley-led-lai-massacre-shamed-us-military-112398904
https://abcnews.go.com/US/wireStory/william-calley-led-lai-massacre-shamed-us-military-112398904