Factual error: All the soldiers that have rolled up sleeves have them rolled up Marine style (with the inside of the sleeve showing) despite being US Army.
Factual error: All the soldiers are wearing black t-shirts under their uniform shirt. Air Force wears black t-shirts, Army wears brown.
Factual error: In one scene Sarah starts her HMMWV with a key. Military HMMWV's have push-button ignition.
Factual error: Sarah would not be carrying a pistol In the US military during peacetime, only officers and MP's are issued pistols. Her uniform designates no such status. While she might be armed as part of the roadblock detail she'd have an M-16 or an M4 rifle.