Who is Anonymous Sergeant of the 101st Airborne from On Killing and what is their importance?

This is a man who serves as an excellent example in the book. He had served in a killing role in World War II. He had been troubled by those experiences. He did choose to serve in two additional wars: Korea and Vietnam. However, in these later wars he chose a healing role. In truth, he worked as a field medic or some similar role. He described the behaviors and results as extraordinary in their therapeutic effects. The fact that he had functioned as a destroyer of life before only made him enjoy being a protector of life all the more and helped him to purify himself.