Revealing mistake: In the opening sequence when Colonel Ryan's plane has crashed and is on fire, you can see a metal pole supporting a burning aircraft shell, not a real plane.
Revealing mistake: Obvious model train in the wide shots of the bombing of the town the train is going through.
Factual error: Sgt. Bostick wears the unit patch of the U.S. Army's 4th Armored Division. The movie takes place in 1943, but the 4th Armored never served in North Africa, Sicily, or Italy, hitting the beaches of Normandy, France, on July 11th, 1944 after being stationed and training in England.
Factual error: At the point when Ryan transfers the points to divert the train, through the fuel dump being bombed, the light simulation of the passing train is of lit carriages, not trucks. (01:46:00 - 01:49:00)
Continuity mistake: When the train is taking water it is sitting on a far right spur line, but when it leaves it is on the main line.