Factual error: The radar guided SAMs are consistently evaded/triggered by the pilots' flares, which in reality only work against heat seeking missiles. Radar guided missiles would be defended against using chaff, basically clouds of aluminium foil strips. It was mentioned in some interviews they didn't want use chaff as it wouldn't really be visible for the audience - hence why they only deploy flares.
Factual error: The pub sign states "whisky" - Irish whiskey is always spelled with an E.
Factual error: On July 4, Kya waits for Tate, watching the sun set and the fireworks at night. She falls asleep on the shore and wakes up in the same position, watching the sun rise. So the sun sets and rises in the same position. (00:55:40)
Factual error: Lieutenant Hudner comments that he went into the Naval Academy right after Pearl Harbor. Pearl Harbor happened in December 1941 and he couldn't have gotten into the Naval Academy until 1942. Then he says, "The war ended a month before he graduated." The Naval Academy is a four-year school. That means he wouldn't have graduated until 1946, a year after the war ended.
Factual error: A .22 shot would be 120-140 dB, muffled with a pillow down to 100-120 dB. Only one person heard the second shot? No one heard the third? Plus at the end there's no way a .22 could pass through a male chest cavity, and halfway into a female chest cavity - it's too low power.
Factual error: One of the warriors tells a trainee they move like a sloth, more than once. Sloths are only found in the "new world", not native to Africa.
Factual error: The parachute flare was not invented till 1922. This film takes place in 1918 but features one. (00:21:15)
Factual error: In the flashback where Otto gets on the train with Sonia, you can see the familiar Pennsylvania Railroad red keystone logo on the side of the railcar (or engine). The scene is approximately year 1972 (born 1955 from tombstone; Army physicals were age 17/18), and stated as in Pittsburgh. His ticket was $1.10, implying a short ride. But PRR ended commuter service in Pittsburgh in 1964. Moreover, PRR was merged into NY Central in 1968, so by 1972, the logo would have been Penn Central's green "PC."
Factual error: The Artist lit a match and candle in his cell. Both are contraband in prison (especially for someone scheduled to be executed). Matches pose a risk of fire/arson and deliberate burning injury or death to a person. Candle wax can be used to prevent cell and other prison doors from locking, creating an escape risk. Also, The Artist's prison cell appeared to be much bigger than a master bedroom (standard size 14'x16'). Prison cells are around 6'x8' or 7'x12'. (01:17:45)
Factual error: It's winter in Montana, yet there are rattlesnakes out in the cold.
Factual error: Rose's legs were paralyzed, but when she was dragging herself on the floor, she occasionally used her feet to help propel her body forward (and moved her feet downward) - something she would not be able to do if her legs were paralyzed. (00:33:40)
Factual error: When Martine enters the passcode to reveal the bats, you see her hit "3" first followed by what seems to be "5" (the rest is blocked by her body). She then tells Michael his passcode is the first 6 digits of pi backwards. The first 6 digits backwards would be "951413."
Factual error: Posters and banners for the fall harvest festival are printed in full color. This would never have happened during the depression in rural Virginia.
Factual error: Pettis' calculation of the amount Connor needed to replace his asset was way off. He stated, "[Cornell] brought me about 250 [$250,000] a year. He had at least 20 more years of service. Subtract five years he might have spent in prison, so you owe me, what? Six point two million." Pettis was presented as intelligent, but a quick mental calculation of even the full 20 years at $250,000 would total only $5 million (not $6.2 - an odd sum). For 15 years, the total would be $3,750,000. (00:28:45)
Factual error: Birdie tries to use the tune recognizing app Shazam speaking to the wrong device. When she does that, the TV in the background plays footage from CNN, with the coronavirus epidemic, featuring Dr. Fauci. However, in that particular part of the scene they also show a map of the US that displays the states with no mask mandate. The chart can't be a May 13, 2020 one (supposed date of the scene), since it shows the situation at the end of the year. Several states in white like Washington, Nevada, Oregon adopted it only in the summer. (00:08:20)
Factual error: The nuclear missiles are shown in flight numerous times. They're travelling horizontally, and have their rocket motors on. Except that long range nuclear missiles are ballistic, and follow a curved path to and from space. And their rocket motors are on only for the thrust phase of the flight, and not halfway to the target.
Factual error: Though the Elvis Christmas Special was shot in June 1968, Bobby Kennedy's assassination happened on June 6th and not while the recording had place -as the movie depicts - between June 27 and June 30.
Factual error: Twice during the movie, streetlights are visible: once when lady Russell informs Anne of Wentworth's engagements, and once while Anne is running after Wentworth. (Streetlights, lit by gas, were indeed conceived during the regency period - but they were experimental curiosities, and certainly not yet installed nationwide).
Factual error: At the end of the film a character is walking through a studio lot in 1952. Through the trees behind him can be seen a section of a poster advertising Jackass Forever (2022).
Factual error: When they were driving away from the bar, neither Zoe (driver) nor Breslin fastened their seatbelts. Seatbelts are mandatory in New York for the driver and passenger (s) and failure to "buckle up" is classified as a primary offense, meaning no other violation must be observed before police can stop and cite violators. (00:57:25)