This is the most amateurish piece of work I've ever seen. Wrong weapons, wrong uniforms, wrong rank insignias (dozens of them), wrong rations. There is no way, NO WAY, they had any US Army consultant, or even any input from an Army veteran.
In one scene, the nutritional value of MREs (Meals Ready to Eat) is discussed. The problem is that MREs were first distributed in 1981. The basic combat meals in Vietnam were the good old C Rations. C-Rats. C's. Etc.
As to uniforms . . . What a mess! This was FUBAR from the get-go. Stripes being worn like shoulder insignia. Officers with shiny rank, not subdued, and rank but no branch. Most actors have no idea how to properly wear a beret, but this cast takes it to a new level of hilarity. A French chef might be impressed, but certainly not a soldier. They just look simply ridiculous.
So, spare yourself the pain of watching bad acting and a pointless plot performed by people apparently dressed up for Trick-or Treat. Just double time right on past this one.