Factual error: When they are chasing Annie's fake parents into Liberty State park, the park is not located near the George Washington Bridge, as shown immediately before they entered the park, and NYPD would not give chase into the park, since Liberty State Park is located in New Jersey.
Factual error: During the 1972 New Year's Eve celebration, Forrest drinks a Dr. Pepper with a logo that wasn't devised until around the mid 80s.
Factual error: The movie is set in 1944, when there were only 48 states, yet we see many American flags with 50 stars, then 48, then back to 50 throughout the film.
Factual error: The day Carrie arrives in NY: June 11, 1986 was a Wednesday not a Tuesday.
Factual error: When Bishop and McKenna are discussing how to kill the preacher, Bishop states that epinephrine and adrenalin are a lethal combination; they are actually two different names for the same thing.
Factual error: When Preach hears Cochise is in trouble, he is shown running down a street looking for him. In the driveway of one of the houses is a maroon 1973 Chevrolet Monte Carlo, but the movie takes place in 1965. (01:03:15)
Factual error: The film is set in 1997. There is a scene where Amelie knocks on a house door and in the background is a new model VW Beetle. These weren't available until early 1998. You can also see several scenes with various new models of Fiat Punto and VW Golf which weren't available until 1999. (00:19:00)
Factual error: The detective played by Rory Kinnear is shown in 1951 typing a request for Alan Turing's military records. He changes a name with correcting fluid - unknown in the UK in 1951.
Factual error: In one game the camera pans to Herb and behind him we can see a man wearing an Under Armor hat. Under Armor didn't come out until 1996.
Factual error: When Reese Witherspoon's character is sitting at the desk reading, there is a cheerleading trophy and the cheerleader on it is wearing a mini skirt, - they didn't have mini skirts on the cheerleading outfits then. (01:08:20)
Factual error: When we see the United States flag, it is the wrong flag. It has 43 stars, something the flag did not have until 1891.
Factual error: The whole conspiracy is doomed from the start! They show a Lunar Module on the set representing Mars; the astronauts were supposed to use this to 'land' on the Martian surface. This is insane. The Lunar Excursion Module cannot operate in an atmosphere; it would burn up on entry. It has no heat shield - the engine nozzle and landing legs would have to poke through it if it had. Exterior protrusions like antennae and steering engines would burn off during descent through the Martian atmosphere. While Mars' atmosphere is thin, it is still more than sufficient to burn up a Lander designed this way. All three recent Mars Landers, Spirit, Opportunity, and Phoenix, had heat shields and parachutes to facilitate safe re-entry. This is not a radical redesign of the LEM; it simply cannot be the shape it is if it is to work in an atmosphere. Any schoolkid would know that, and the world's media would not be fooled for a second.
Factual error: During the first tunnel sequence, all the cars travel very far into the mountains, turn lots of corners, yet not only is Gisele still able to speak to them over the radios, their GPS still works. GPS signals invariably need a clear 'sight' of the sky and can penetrate light cover, but most certainly not that depth and cover. (00:58:05)
Factual error: After calculating the amount of water they have available Townes and A.J. announce they will be living on "a pint of water per person per day". One problem - they'll be dead within three days, if they manage to last that long. A GALLON - eight pints - a day is the absolute minimum in conditions of dry, extreme heat such as they are experiencing, and that is for a resting male. Take their strenuous exercise into account and you can push that up to two gallons a day. One pint a day? Forget it.
Factual error: There is a brief shot of a couple driving through the streets near Eatonville, Florida. In the background a mountain is visible. There are no mountains in Florida.
Factual error: In a scene set in 1862 or 1863 Bill the Butcher says: 'An Irishman will do for a nickel what a ****** will do for a dime or a white man for a quarter'. The first nickel 5 cent piece was coined in 1866. At the time of the scene the 5 cent coin was a small silver coin called a half-dime. (01:10:00)
Factual error: The U.S. Paratrooper uses his "clicker", and the German answers with a "double" click-click - click-click. The Paratrooper stands up, and the German soldier shoots twice with his Mauser K98 without pulling back the bolt between shots, which is impossible.
Suggested correction: There could have been another German soldier present who fired as well.
Factual error: In the assault on Fort Wagner, the regiment attacks the fort from the wrong side. In reality, the troops attacked from the south.
Factual error: Krakatoa is west of Java.
Factual error: In the scene where Roxie is placed in the "paddy wagon" to be taken to Cook County Jail, the prosecutor refers to himself as District Attorney Harrison. However, the court system in Illinois doesn't have district attorneys; rather, they have state's attorneys. The original play by Maureen Watkins correctly calls him a state's attorney.