If you like Maudlin, here is one.
The Marmalade - Reflections of My Life - Vietnam Vets
https://www.youtube.com/watch?v=iE9TNG8IQNI
I never knew it had anything to do with Vietnam.
It wasn't as obvious as The Green Berets, by SSgt Barry Sadler, or Ruby Don't Take Your Love To Town, by Kenny Rogers and The First Edition.