Recently Naomi Tirosh wrote:
 
Films dealing with the vietnamese conflict are: Coming home, The Deer Hunter,
Apoclypse Now, Garden of Stones, Full Metal Jacket, Good Morning Vietnam,
Birdy, Born On the Forth of July, Platoon.
 
I might add:  Don't forget Hanoi Hilton, Who'll Stop the Rain, and of course,
the best movie about Vietnam that wasn't about Vietnam, M*A*S*H...