Factual error: In the scene where the Ranger trainees first meet Samuel L. Jackson, he's wearing the rank of a Specialist on his collars even though he's a Master Sergeant. Title 18, Chapter 33 of the US code prevents the unauthorized wear of a military uniform (among other things), however this does not automatically correct the mistake since a common misconception is that one slight alteration is sufficent to make the uniform legal. Having the wrong rank on is too obvious of an alteration, especially for anybody who has spent more than a day in or around the army and would still be punishible by law if he was dressed in an attempt to fool your average citizen outside of a movie.

Other: When Connie Nielsen is driving the Hummer (with John as the passenger), the steering wheel doesn't move, but her hands do.