Continuity mistake: When Gunny Highway first introduces himself to his recon team, he walks into their barracks building. This building was at the end of a row of barracks. Minutes later, when Highway walks out the back end of this building, he actually comes out of a different building further up the street.
Continuity mistake: Halfway through the film when Gunny Highway takes the troops on a run, one of his Marines suggests he's lost. Stitch Jones says "C'mon, let's smoke this sucka." All the troops run past Highway, with Jones leading the way. When the shot turns to a rear view, Jones is the last one to pass Highway.
Continuity mistake: Highway and Choozoo are in the bar when Little Mary Jackson tells them that their battalion has gone on full alert. They both leave the bar and it is night time (also a cut away clip of Aggie being driven past in a convertible car shows darkness). The scene then cuts to the barracks and throughout the scene, you can see through the thin curtains that it is daylight outside. The scene then cuts back to the parade ground and it is night time again.
Continuity mistake: In the last scene on Grenada, when the Col. lands his copter, it lands with the port (left) side of the copter facing the rock retaining wall. After the Col. tells Highway and Choozoo to "Get out of my LZ." As Highway and Choozoo walk away the starboard (right) side of the copter is facing the rock wall. You see the tail facing the camera.