Continuity mistake: In a major fight scene two soldiers on opposite sides are jumping and spinning and tapping each other on the head with their swords.
Continuity mistake: When Po is killed by the NVA it is the middle of the night, Captains Cahill and Doyle are close enough to the village to hear the shots and rush back to the village but as they enter the village it is early dawn.
Continuity mistake: In Morocco, when Lee, Capby, and Roberts take off, they still have their external fuel tanks under their wings, indicating they have not entered combat. As they are flying and do their mission, they have dropped their tanks. But after Lee says "let's head for home," you see one Mustang landing, external tanks and all.