A 58-year-old Vietnam veteran?
He’d be a thirteen year old patriot, going off to ‘Nam.
Nam ended in 75. If he’s 58, he would have been 18 in 1974. He could have gone in 73 if he lied about his age, or volunteered, or if his birthday lined up right, so he could have been on the ground there for a year easily, though it would have had to be right at the end.
“What were you, a drummer boy?”