Factual error: As the colonel and his companions ride out of Blackthorne, Texas, they pass Saguaro cacti, which, oddly enough, only grow in the Sonora Desert, a far distance from Texas.
Factual error: In the scene where the king attempts to seize the five members from Parliament, Cromwell makes a dramatic refusal to leave and proposes various "Laws" to prevent his arrest. Cromwell was not one of the five members whom the King tried to arrest and no law can come into force until it had been signed by the reigning Monarch anyway.
Factual error: When the Japanese planes attack the airfield, none of the American planes have numbers or letters, just a star.
Factual error: In the movie you see Scottish Pipe Band playing. Pipe Bands where not established in Scottish Regiments before the Crimean War (1854-1856), there were only solo pipers. (00:35:00)
Factual error: In the scene where Joe Patroni is attempting to move the stuck 707, Bakersfield is standing beside his car watching, very close to the plane. Without some form of hearing protection, he would have been very quickly deafened by the noise - a 707 at takeoff thrust is incredibly loud. I once watched a 707 take off from about a half mile away and forgot to cover my ears - it was so loud it actually hurt.
Factual error: The worst historical distortions in this film must concern legendary "Wild Bill" Hickock. First of all he wasn't killed by a teenage boy, but one John McCall, a man in his 30's. McCall sneaked behind Hickock who was in the middle of a poker game and shot him through the head killing him instantly. Secondly this took place on August 2 1876, about five weeks AFTER the Custer's Last Stand. (01:46:30)
Factual error: James Franciscus arrives at a New York City subway station called Queensborough Plaza. Queensborough Plaza is an above ground station. Queens Plaza is the name of an underground station in New York City. (They are located within walking distance of each other, but are definitely distinct stations). (00:40:30)
Factual error: When Edgar the Butler directs the Old Solicitor upstairs they have a bit of a struggle with the steps. Before this you saw the Solicitor arriving in his car and this gave you an impression how high the first floor of the building of the Old Spinster was. Judging by the amount of steps on the stairs the pair would have ended up on the roof.
Factual error: In the football game scene, the players all have helmets with modern style (1970's) face guards.In 1951, the time period of the film, no face guards were used.
Factual error: The lock on Secker's front door, seen in the shot when he returns home from Highgate Cemetery, is a modern (stainless steel) Yale lock and barrel, not a High Victorian dead lock; his front gate is made of paper-thin iron from the 1960's; the lamp post Screen Left is supposedly gas-powered but has an electric feed running over the pavement.
Factual error: Throughout the movie, characters strike matches to light lamps. While "strike anywhere" matches had been invented by this time and were quite the rage in Europe (despite an alarming tendency to explode due to the volatile chemicals used), they were an unknown commodity on the American frontier until well after the turn of the century. (00:49:00)
Factual error: Due to paranoid fear of sabotage, all Japanese Americans were interred in camps along the west coast during WW2. So it would have been MOST unlikely for Yamashita (especially considering his military background) to simply walk about freely and to have work as a gardener.
Factual error: At the early stages of the movie, Scrooge is talking to a man who owes him money. Scrooge mentions the August Bank Holiday. Bank holidays were not introduced until 1871, after the period in which A Christmas Carol/Scrooge is set - around 1835 (Charles Dickens, the author of the book, died in 1870).
Factual error: When Clint Eastwood catches an Indian arrow in his left shoulder, he instructs Shirley MacLaine to prime the arrow shaft with gunpowder, which he then ignites as she forces the shaft all the way through his shoulder. Presumably, the burning gunpowder would cauterize the wound all the way through his body, or that's what the filmmakers asked the audience to believe. In reality, gunpowder is historically well-known for causing gangrene in open wounds. With a shoulder full of gunpowder cinders, Clint Eastwood should have died of gangrene and sepsis by the end of the movie.
Factual error: It's common in movies of certain eras to have cars catch fire when in real life they would not, and the car flip that concludes the chase at the beginning of the movie offers an example of that...but goes even further, much further, when you see the armored van impacting against the roof of the flipped car causing it to explode with such violence and inferno of flames coming from within the passenger seats you'd swear it had to be driven by giant dynamite sticks with arms and legs. (00:15:25)