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: The 2 fighter aircraft that took off from the carrier were unarmed. Later shots showed the planes armed to the teeth.
Factual error: The optical red dot sight on Bruce Willis' M16 rifle is mounted back to front and would be useless.
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.
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.
Revealing mistake: When Dr. Kendricks closes the eyes of the dead woman, you can see on woman's neck, that she is still breathing.
Audio problem: Towards the beginning (in the night) the doctor is giving a young baby a shot. When she gives it to her it go to the girl's face (whose eyes are covered) and her mouth is closed when you can hear her crying.
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.