Factual error: It is stated that Miss Trunchbull competed in the Olympics in shot put, javelin, and hammer throw. According to her jersey those were the 1972 Olympics. The hammer throw wasn't added as an Olympic event for women until 2000.
Factual error: Throughout the movie, we can hear Ash's motorcycle shift gears, but we can see that his hands never disengage the clutch, a must do for a smooth shift like we hear.
Factual error: Casey arrives at the desert landing in a jeep that is flagged with 4 stars (for a 4 star general) although he is only a 3 star general (as evident by the 3 stars on his shoulder boards). (00:33:30 - 00:35:25)
Factual error: When Kara is sitting up on the bed after Einon throws her down, you can see she is wearing a bra. They didn't have bras in Medieval England.
Factual error: A vinyl knife is present among other tools of torture during the 1700's sequence, but vinyl flooring did not come into the commercial market until the mid twentieth century.
Factual error: After the fight in "Joe's", Michael, Frank, Huey, and Dorothy were arrested on multiple charges and confined in the same jail cell plus the dog was also allowed to stay with them. The police officer shut off the lights and left the arrestees alone overnight in the cell; a jail would have officers/staff present at all times. (00:50:19)