I'm a Nam Era vet who never went to "Nam", but I had a friend who went, and we celebrated all night long when he came back in one piece.
Just like in "Apocalypse Now", he had to go back. When he returned for the last time, he was so messed up in the head that no one hardly knew him. I had to do some research in order to find out why, because every time he started telling me about things, he broke out in tears and was never able to finish.
My research revealed things too gruesome to repeat.