What did Howard ruede describing in his letter?

In his letter, Howard Ruede described the atrocities he witnessed during the My Lai Massacre in the Vietnam War. He detailed how American soldiers, particularly those from his own unit, Charlie Company, indiscriminately killed unarmed Vietnamese civilians, including women, children, and the elderly. Ruede expressed his horror and revulsion at the actions of his fellow soldiers and questioned the morality of the war. He later testified about these events before the Russell Tribunal, an international commission established to investigate war crimes committed by the United States in Vietnam.