Answer:
War crimes
Explanation: It's actually pretty easy. The article states war crimes committed by American soldiers in the war. The testimony mentions the horrors and atrocities the soldiers did. "The first thing we saw was a boy...and the first sergeant shot at the boy.-" There are many atrocities mentioned in the text, most likely those events traumatizing the soldiers. This evidence might be part of what explains why the soldiers hated the war.