Wife's uncle was WWII Pacific Marine. I did my military thing early 1970's. We were only military in our family. Unc' only talked to me about some of his stuff. I was instructed not to repeat the particulars, ever, even now since he died. Gruesome stuff! AH is just a game. It says, "thou shall not kill" is about what it does to one's self mentally and psychologically after the fact, I think. Cops know! I asked him if he remembered it. Age 70 he still had nightmares waking up screaming. He told me it was like it happened yesterday, quite vivid still in his mind. WWII generation suffered it, no label for it, then, PTSD. How to cope? Usually booze.
I think that is true about the real heroes and not the guys that run at the mouth and pretend they were there.