No, US troops are always constantly ordered to commit war crimes, and always did.
Mai Lai massacre was not the one off claimed, but was standard procedure, with "strategic hamlets" and "free fire zones".
The total was 3 million dead actually, and it was always obvious Ho Chi Minh was the hero who defeated the French.
The invasion of Iraq was not only an illegal war crime of an innocent sovereign nation, but done in the most awful and barbaric war crime possible, "Shock and Awe", eliminating food, water, and electricity to a desert region, killing half a million innocent civilians.
Even submarine warfare by the US was an illegal war crime, causing massive illegal starvation in both Germany and Japan.
Do I even have to mention Hiroshima and Nagasaki?