During one interview an enlisted Marine says that he and his fellows "hit the ground", whereas in the real world of the real US Marine Corps, as in the US Navy, the standard vernacular term is to "hit the deck", even if the deck does happen to be the ground.
Anthony DiNozzo picks up a shell casing (when in Iraq) and says "7.62mm, not our round" The 7.62mm is a standard NATO round used by he U.S. military. And all of NATO. The round Tony picks up is a Russian 7.62x39mm casing common to the AK-47, the NATO 7.62x51mm round is distinctly longer.
In the last scene in Iraq, Jardine gives Tabina a laptop. It will be pretty much useless, since she failed to include a battery charger to go with it..
The scenes in Baghdad's Green Zone reveal mountains in the immediate background. There are no mountains in the immediate vicinity of Baghdad.