Deliberate mistake: When the list of the KIA during the raid is showing, the name of Matt Rierson is up there but he died 3 days later from a mortar attack on the base. (02:11:50)
Continuity mistake: One scene shows a Blackhawk being called into the fray from circling the city. The first outside shot shows no one inside the bay then the next shot it's full of soldiers and guys sitting with their legs dangling out. (01:12:24)
Factual error: In the movie, the Rangers and Delta operators defending the crash site are engaged by several 'technicals' (pick-up trucks with crew served weapons mounted) including one with a recoilless rifle directed by the Somali 'head honcho'. Also, several technicals seem to (somewhat implausibly) spring from the woodwork as they flee the city on foot... However, during the entire course of the actual battle, there was never a SINGLE mention of the pinned down forces being engaged by such vehicles and the Rambo-style capture of the recoilless rifle was a comical fabrication.
Continuity mistake: When the soldiers first go into the town in the helicopters, one of the helicopters lands on a roof. The camera cuts away for a split second, but when it comes back to the helicopter that landed on the roof, the blades have stopped moving completely within that one second. (00:41:01)
Other mistake: In one scene a pair of soldiers cut off from the main body of troops are trying to link up with some of their comrades. When the camera zooms in for a close-up of the soldier carrying an M-60 machine gun, the weapon appears to be loaded with a belt of blank rounds. (00:54:35)
Continuity mistake: After the failed femoral artery surgery attempt, that soldier slowly dies. When he finally stops breathing the medic jumps in to do CPR. The soldier dies with a blank stare, but during the shots of the medic doing CPR the dead man's eyes are closed. (01:54:40)
Visible crew/equipment: When the Ranger driving the 5 ton truck is hit by the unexploded RPG, the closeup of his midsection shows (although VERY briefly!) the black special effects gaffer tape that secures the special effects charge. (01:25:00)
Visible crew/equipment: After the first black Hawk has crashed, a lone US soldier guarding the wreckage comes under attack by Somalis with RPGs. In a side shot of one of the missiles flying past the wreck, you can see a wire in the air along the trajectory. (00:56:35)
Revealing mistake: Just after Jamie 'Smitty' Smith has passed away due to being shot in the thigh, the medic starts CPR. The camera cuts from the medic to Smitty and you can see his eyes move. (01:54:57)
Revealing mistake: When the two Delta snipers are approaching the second downed Black Hawk, a Somalian man in a white shirt is shown from behind. Clearly visible is a pack on his back. A few seconds later he is shot by one of the snipers in that exact spot. It's a blood pack. (01:23:45)
Visible crew/equipment: When McKnight's convoy rolls away from the scene where the Delta guy got his legs blown off, there is an explosion right next to one of the Humvees. You can see a small pile of dirt and the supposed grenade or RPG explodes exactly in the middle of it. Seems like it is an explosive charge that was deployed in the dirt bump for security reasons. (01:09:27)
Revealing mistake: At the shooting range just after Blackburn has reported to duty, a Humvee pulls up and the barrel of the .50 on top is wobbling - it's a rubber prop. (00:12:48)
Visible crew/equipment: During the scene after the soldier falls out of the helicopter, an intense gun battle breaks out. As the troops rally to evacuate the injured man, another soldier lays down some suppressing fire. Look in the lower left corner of the screen. Two crew members, one wearing eye protection and one wearing ear protection, are visible.
Continuity mistake: When Sizemore goes to cut off his cast, if you look closely the sleeve is down over the cast just before he pulls out the knife. Then it's rolled up. (01:14:14)
Factual error: After the second Black Hawk helicopter (Super 6-4) gets shot down, all of the crew members aside from the pilot appear to have been killed in the crash. In reality, all of the men survived the crash. They were later killed by the Somali mob, except for pilot Mike Durant who was taken prisoner.