Factual error: In the last battle scene when you see shots of the German destroyer through the periscope the last one shot before it's blown up is really bad angling. The ship is far away but in the scope it's very close and the periscope (in order to get that camera angle) is 100 ft in the air.
Factual error: When Benjamin is handing a store clerk some money, he is giving him a $5 bill with Abraham Lincoln on it. This happened more than 80 years before he was president. And they didn't even use dollars during the Revolutionary war. They would have used British pounds in coin form, not paper money.
Continuity mistake: The soldiers takes off from the aircraft carrier in Boeing CH-46 helicopters. In the next scene they are flying towards the target and the helicopters are magically upgraded to the Boeing CH-47 model. The mistake is clearly seen when counting the landing gear on the two types. The CH-46 has a single front landing gear and the CH-47 has a double landing gear in the front.
Continuity mistake: In the scene where Miter is planning to escape from the army and Bozz tries to stop him, watch the red mark on Miter's neck. It miraculously disappears and reappears many times. (00:45:05 - 00:48:30)
Factual error: The Bell 212 used as a MEDEVAC helicopter in the movie wasn't in service until 1975, while the movie takes place in 1973. At the time, the Bell 205 was in use by the IAF.
Other mistake: Sophie calls her Swedish colleague "Captain Perrson", however the rank on his shoulder say lieutenant colonel in the Swedish air force.