I believe my Father was specifically told not to discus his actions or assignment in Southeast Asia.
A career Marine NonCom told me about it, briefly, at the funeral.

Im OK with it. I figure Dad was, too. I heard lots of stories about shore leave, the buddies he hunted with, and daily things that occurred in out of the way duty stations. Dad loved the Corps.
Dad told me if I wanted to join, join the Coast Guard. He thought the duty stations were better. Dad was biased to hunting and fishing, and figured the Coasties had more opportunity where they went.
I had pretty good options out of school.

Best,
Ted