Among the many other war film references listed recently, some work should (sorry, I meant to say "attention should") be paid to the work of Sam Fuller, especially THE STEEL HELMET, about Korea--made in 1951 during the war itself-- and CHINA GATE, possibly the earliest Hollywood Vietnam flick (1957), dealing with the French phase of the struggle, before Dien Bien Phu. As I recall, it's sort of a thinking person's GREEN BERETS, with a surprisingly solid supporting performance by Nat King Cole. Dalio also has a supporting role.