Factual error: In the first scenes, when US Soldiers are attacked, the EOTech Aiming Device on one soldiers Rifle is mounted backward, e.g. looking towards the soldier, not the enemy.
Factual error: When calling for support in Balad, Ferris' partner gave the coordinates in latitude and longitude. The U.S. military only uses and recognizes MGRS (Military Grid Reference System) coordinates. Instead of "North 34 degrees, 20 minutes, 16.8 seconds; East 44 degrees, 24 minutes, 14.4 seconds", the quote should have been "38S MC 45179 99794". (00:19:30)
Factual error: In the first scenes of the movie, when the SWAT team raids the house of terror suspects in the UK, the tactical team waits to move in until a passenger train passes by the neighborhood. The train is an Amtrak train and not the type of passenger train that runs in the United Kingdom.