Factual error: Near Karbala, during the first choppy, slow motion shootout, Mark Wahlberg is shot in the vest with an AK-47 and somehow manages to walk it off. This is preposterous. The vest issued to troops in Desert Storm (and the one he is wearing) is the PASGT fragmentation vest, which is only rated to stop shrapnel from explosions and won't even defeat a pistol round without offering severe ballistic trauma to the wearer. If you were hit with an AK-47 in a vest of that rating, it would tear through the kevlar like a hot knife through butter.
Factual error: When Gates, Barlow, Elgin, and Vig are leaving the village after the milk truck explosion, they give the people MREs. However, the MREs they are passing out are 1996 designed packages. From 1981 until 1995, MREs had a dark brown bag while ones produced from 1996 and current are tan.
Factual error: The movie is supposed to be set in central and southern Iraq. At one point, the men are driving along in a Humvee north of Nasiriyah towards Karbala, just south west of Baghdad.Throughout this section of the film, mountains can be seen on the horizon. The actual desert of Iraq is so flat it might as well be a parking lot. The only actual geographic features of the terrain are agricultural berms, which those mountains aren't.