Continuity mistake: When Sgt. Peterson is standing on top of the corrugated tin under the helicopter, his safety strap attached to the helicopter appears & disappears between shots.
Continuity mistake: In this scene we see Muldoon giving a talk to the press. As he empties the ammo box on the desk where the press are seated we see John Wayne and another soldier in the background standing a meter apart. We then get a close up shot of Wayne and the other soldier and they are shoulder to shoulder. In the next long shot we see they are standing a meter apart.
Continuity mistake: After kidnapping the VC Commander, at one of their rest stops, Lynn is sitting, chin down but looking up. In the scene there is a large green leaf over her left shoulder from the bushes behind her. Later they take one last rest before the choppers arrive to take them. Lynn is scene sitting on a rock in the background. John Wayne looks at her and her brother in law. The scene cuts to her again and its the same clip from the previous rest period, with the same green leaf over her shoulder, but when they cut back to a long shot she is hanging her head and there is no green foliage near her.