Factual error: When SGT Sanborn is placing the items in the white box, you can see his special skill badges. He has an EOD badge placed above his Combat Infantryman's Badge which should never happen. While it is possible for an EOD member to have a CIB (second MOS), no badge is ever worn above the CIB, EIB, or CAB.
Factual error: In the car bomb defusing scene, Specialist Eldridge spots a possible insurgent filming him with a video camera and states "He's getting ready to put me on YouTube." However, the film is set in the summer of 2004 (according to the official website), while YouTube was founded in February of 2005.
Factual error: Sgt Sanborn is shown wearing a Combat Infrantryman's Badge, and he says that before EOD he was Military Intelligence, however, Infantry is the only MOS that gets the badge while everyone else gets the Combat Action Badge. Also the Combat Infantryman's Badge would be worn above any other badge, in the movie he wears it under the EOD badge.
Other mistake: When James is returning to duty in one of the last scenes of the movie, apparently he is arriving in one of two twin-rotor helicopters. As the troops disembark down the rear ramp, they walk across what looks like the shadow of the elevator of a C130 Hercules airplane.
Continuity mistake: During the encounter between Sgt. James and the taxi driver, James shoot to the taxi's windshield in an attempt to make the driver go, when he's backing up you can see James following him and pointing his gun to the now unbroken windshield, when scene changes, it's broken again.
Factual error: In the scene where the taxicab overruns the roadblock, he would have likely been shot before even coming close. Rules of engagement for a roadblock dictate that any vehicle not responding to commands to stop or after firing warning shots would be lit up, especially at such fast speed, which is a sign of aggression.
Factual error: In the scene where Sanborn goes to James trailer he is wearing two American flags on each shoulder when only one is supposed to be worn above the combat patch right shoulder. This can also be seen later when LTC Cambridge sits down with Eldride when he is playing the X-Box in which case Eldridge does not wear any flags could be he just got back from mission and has not replaced them on his uniform.