My great uncle was a Naval supply officer in WWII, and wrote a bunch of letters to my grandmother. He never left the ship during battles, so he couldn't have had as intense a combat experience as others. But he describes his time at the battle of Iwo Jima, killing Japanese soldiers who were swimming at the ship with explosives, and watching people die as Japanese fighters strafed the decks. What was interesting to me is that he doesn't particularly characterize it in a positive or negative light, but mostly just as completely surreal. He several times says he felt like he was in a movie. Unfortunately, he died before I was born and he never wrote anything after the war was over about his war experience. So I don't know how the reflection of time effected his thoughts on it.