Continuity mistake: The 2 fighter aircraft that took off from the carrier were unarmed. Later shots showed the planes armed to the teeth.
Continuity mistake: Towards the end of the film, Tom Skerritt is on the same aircraft carrier as the fighter jets, but right after the jets bomb the enemy soldiers, Tom Skerritt arrives in a helicopter. There is no way that a helicopter is just as fast as an F-18 fighter jet.
Continuity mistake: In the overhead scene of the first village, after the rebels had slaughtered all the remaining people, all the people strewn across the street are completely clean, no gunshot wounds, no blood, no gore or anything. Also in the same scene, the people that stayed behind (exceptions being the two nuns and the priest) had been so severely injured that they were unable to walk, so how did they miraculously heal themselves after they were attacked?
Continuity mistake: In one of the scenes with Tom Skerritt talking to Bruce Willis, take a look at Tom's watch. It starts out at about 4pm, then 4:35, then 4:20.
Factual error: During the movie Tom Skerritt is seen talking to the SEAL team from the carrier's flight deck. That's impossible; command & control operations are being performed from the inside of the ship. Besides, roar on the flight deck would be so loud making it impossible to hear each other.
Audio problem: In the final shoot-out with the Nigerian rebels, Bruce Willis inserts a new magazine into his rifle. When he attempts to slap it into place, he completely misses it but we still hear the sound effect for him hitting the bottom of the magazine.
Revealing mistake: When Dr. Kendricks closes the eyes of the dead woman, you can see on woman's neck, that she is still breathing.
Factual error: At the end of the movie when Willis calls in the F-18s for an air strike we see them engage the rebels by firing a couple of AIM-120 AMRAAM missiles at the ground. This is wrong because an AIM-120 is a air to air missile only. The warhead on the missile is only a few pounds and doesn't produce the cluster munitions like effect that they show. It would have made more sense if the 18s would have dropped a couple of CBU's (Cluster Bomb Units) instead.
Continuity mistake: During the rebels' first major attack on the fleeing party, there is a lull in the fighting where Lt. Waters runs to find out whether Lena Kendricks is okay. When he reaches her, he lifts her up and she places her right hand against her ear. However, during different shots in this scene as he is talking to her, her hand goes from being next to her ear to not being there, several times.