Factual error: Once the men first climb up to "Hacksaw Ridge," the camera pans over numerous corpses. One of them has an M1 Helmet lying on its top to where the liner is seen. The liner has the web suspension straps cross each other instead of being tied in the center. This means the liner is a Vietnam era type, and not World War II.
Factual error: Cheryl works in the Navy Exchange bookstore. In the United States Military(all branches of service) ONLY civilian employees work in the military exchanges, which are small retail stores for military and their family members.
Factual error: In one scene Alvin is driving over a bridge on the Mississippi. He is going in to Prarie Du Chine but the bridge is in a different town, and he is going from east to west not west to east. The town he is driving into is Lansing, Iowa.
Factual error: When they tour the UK with The Rolling Stones the film states 1968, when in reality it was 1966. They then perform "Proud Mary", which Creedence Clearwater Revival did not release originally until 1969, and wasn't covered and didn't become a hit for Ike and Tina Turner until 1971.
Factual error: In the scene where Dave is playing cards with soldiers, some of the paper money being gambled is a design of U.S. money not introduced until about 30 years later.
Factual error: The movie's set in the late 90s, but a 2015 Lexus and Audi are visible behind a girl when they first arrive in LA. (01:23:00)
Factual error: vWhile on the fishing boat, the flag flown has 50 stars, while the movie is set in 1941. The US didn't have 50 states, and thus that flag, until 1959. (00:30:08)
Factual error: Towards the end of the movie, George W. Bush is seen walking through the Cross Hall of The White House towards what is in reality The East Room. Behind him we see a large staircase with a plant next to it on the other end of the hall. These should not be there: that is where the door to the State Dining Room really is. In the next shot we see W. coming upstairs from a winding staircase that doesn't exist.
Factual error: The helicopter flown is a Bell 407. The movie is set in '88 and the first flight of this type was 1994.
Factual error: The mogul run where Molly has her accident is described as a 52 degree slope, when it should actually be a 52 percent slope (23.4°).