When Vanessa is shutting her car door, her soccer ball keychain appears and disappears within the scene.
When one soldier is told to fire the AT-4 at a gunman on the roof, he is holding it backwards when he is firing it. The rocket comes out of the smaller end of the tube, not the larger.
During the ambush when Marsh pulls Price out of the truck he immediately applies QuickClot over hand and proceeds to hold it with bare hands before applying gauze to her hand. First QuickClot powder was only designed for deep artery wounds for the arms and legs. By pouring this instead of applying a tourniquet with a pressure gauze is what caused her to lose her hand through amputation. Second, Marsh's hands should've been burned from the extreme heat as we wasn't wearing gloves.
When the one soldier decides to re-enlist, as he is saying goodbye to his parents and getting into the taxi, the cover he puts on is an older style Navy/Marine Corps 8-point cover.
Sarah is shown a box of memorabilia, in particular a photo of Sarah which Tommy claims the deceased carried with him all the time whilst on duty. However the photo is pristine, not a single mark or crease present.
The M2-HB .50 caliber machine gun on the lead HMMWV is in a bizarre mounting that is nearly flush with the roof. It would make it nearly impossible to traverse and elevate the weapon, and the Gunner would have to hunch down and manually lift a weapon that weighs over 100 lb.
When Army Private Tommy Yates (Brian Presley) left his parent's house getting into a taxi, after he decided to re-enlist for another tour, he was wearing a Marine 8-point cap (or cover) instead of the patrol cap or black beret which were the authorized headgear to go with the Desert Camouflage Uniform for US Army personnel.
When Marsh is in the kitchen during his welcome home barbecue, a part of the camera is seen in the mirror next to the sink.