Same here. He never talked about it. He was a forward artillery observer with the 93rd Armored Field Artillery batallion.
I read a great memoir about a Marine group in Vietnam, a group that a good friend of mine served with. They occupied a place known as “Hill 55”, near Da Nang. The book, the story was written based on the commanding officer’s diary/log of events during their tour. It was very factual, and it was well-written. Well-written enough to pull the reader into the story.
It took him 30 years to write the book. PTSD, just dealing with the demons of the war. He saw people die. Digest that for a minute!
I have a copy autographed by my friend (not the author), but I fully understand from reading it, how hard it was to write it. How hard to document the situation. Had he not kept an accurate journal, it wouldn’t have been written.
BTW, it was basically a self-published book. It won’t be on Amazon or the NYT best seller’s list. I’m privileged to have read it.