I might have already posted this one but Sympathy For the Devil by Kent Anderson is a great read. I’ve read it multiple times. There are two sequels Night Dogs and Green Sun. I’ve read Night Dogs but not Green Sun. I highly recommend it. Here’s an excerpt.
“Hanson stood just inside the heavy-timbered door of his concrete bunker, looking out. There was no moon yet. The only sound was the steady sobbing of the big diesel generators, but Hanson heard nothing. Had the generators ever stopped he would have heard the silence, a silence that would have bolted him wide-awake, armed, and out of his bunk if he were asleep.
He stepped from the doorway and began walking across the inner perimeter toward the teamhouse, a squat shadow ahead of him in the dark. His web gear, heavy with ammunition and grenades, swung from one shoulder like easy, thoughtful breathing. The folding-stock AK-47 in his right hand was loaded with a gracefully curving thirty-round magazine.
As he got closer to the teamhouse, he could feel the drums and steel-stringed guitar on the back of his sunburned forearms and against the tender broken hump on his nose. Then he could hear it.
Hanson smiled. "Stones," he said softly. He didn't have enough to pick out the song, but the bass and drums were pure Stones.”
The 13th Valley by John Del Vecchio is another good Vietnam novel about the 101st in I Corp.
The Fire Dream by Franklin Allen Leib is another great one. There’s a lot of courage, honor, love and loss in this one. The speeches by the character General “Blackjack” Beaurive gave me goosebumps. It’s main character William Stuart is a Naval Officer ultimately assigned to ANGLICO and most of the characters come together there.