Blooper

The train engine changes in the beginning of the movie. In the station it is an engine which hadn't been serviced in Germany and in the night shot, where the train is on its way to Stuttgart, it's a different locomotive (different smoke stock, no bull bar).

At the end of film Willoughby's cigar is full length first, at the next moment it is much shorter, finally it is long again.

When the guy with his face shot off speaks, in the view from behind him, his mouth is not moving.

A hand-held walkie-talkie radio is used to communicate with Allied airplanes. This would not have been possible. Specialized air/ground radios were used to communicate with airplanes during World War II and a hand-held walkie-talkie unit would not have been able to do that.

Near the end of the film Stuttgart is shown being bombed by a large B-17 raid, and the bombers and the escorting P-51 Mustang fighters are shown flying and bombing at low level. In real life B-17 raids were conducted at high level, and in any case escorting fighters would never fly so low next to the bombers, as that would negate any ability to protect the bombers from higher-flying German fighter aircraft.

The ticket for the Stuttgart Opera shows several wrong details. 1. It is not named "Stuttgarter Opera", but "Oper Stuttgart". It looks like the film team wanted to Americanize the word "Oper" to "Opera" which can be seen at the "A" which is not correctly on line with the other letters. 2. Wagner is spelled with a "W", not with a "V" (Vagner) 3. It looks like the movie company wasn't able to use the German character "ß" as for "Großes Haus" (means "Grosses Haus" ("Big house")). Nevertheless: the opera in Stuttgart has no "Großes Haus". 4. The Oper Stuttgart has indeed 3 boxes (right, middle, left), but they might not have been named "Loge 1", "Loge 2" and "Loge 3". 5. The circled text in the stamp on the ticket seems not to make any sense.

When the German panzers first appear, the U.S. group suddenly starts using some sort of shoulder-held anti-tank rocket launcher which is neither a WW2 U.S. "bazooka" nor a German panzerfaust. There is also no indication how they obtained the device or the charges.

Some insignia on the two main German officers is incorrect. The Army officer has a Luftwaffe cockade on his hat, and the SS officer is wearing Army collar tabs,

When they are going to the nuclear facility and the camera pans round the back of an anti-air 88mm, it is just two empty tubes; there is no breech block.

When escaping from the nuclear facility the company exits a warehouse. In one shot a door sign is visible, saying: "WACHE Warnung Schieben ohne Vorwarnung!" which means: "Guard - Shooting without premonition". But the film crew misspelled the German word "schießen" (shooting) and used a "b" instead of the German special character "ß".

When the company escapes from the nuclear facility they open a door with an "Eingang" sign, which hangs upside down.

The German tanks used in the initial battle are Soviet-made T-34/85s and a SU-85 self-propelled gun with German markings. In the war, Germany did field captured vehicles, but Soviet tanks wouldn't be on the Western Front. The use of these vehicles was due to the filming location-Bulgaria, a former Eastern-Bloc state.

In addition, the infamous Tiger tank is used on the film cover. No Tiger tank ever appears in the film.

At 1.01:30, Nate enters the Opera house. As he walks past the doorman, a poster is seen on a pillar to his right hand side announcing a performance of Arnold Schönberg's Gurre-Lieder, announcing "Unter Leiting des Komponisten" (conducted by the composer). The poster can be recognized as one for a concert that actually took place in the Alberthalle in Leipzig, on march the 6th, 1914. (the top of the poster that shows date and location is kept just out of the frame.)

While the concert obviously doesn't match time and location of the present in the film, it would also be highly unlikely that it could have been in the Stuttgart Opera building as decoration: In Nazi Germany, music by the Jewish avant-garde composer was considered "Entartet" (degenerate).

The gravestone at the end has a join line visible down the edge showing it is made from plastic.

When escaping the Nuclear Facility. The Nazi shot off the walkway falls and hits the Go-pro / camera under the fall, turning it sideways.

When the company gets ambushed delivering ham, a medic is doing CPR on a wounded soldier. CPR did not become a medical procedure until the mid-1950s.

On the side patch flags of the American soldiers, it can be clearly seen that the U.S. Flag is the new design, adopted in 1959, with 50 stars arranged in a staggered pattern, and not the 6 by 8 48-star arrangement valid in 1945.

At 00:42:30, a verbal anachronism occurs as Brent Willoughby, British POW, introduces himself, "British Air Force". Brent Willoughby would have stated, "Royal Air Force" or simply "R-A-F".

The Army athletic logo on LT Conti's uniform is the Army CapeMan. This logo was not in use until the 1990s.

When en route to bomb the factory, a B-17 pilot radios that he has his target 'locked'. There were no electronic systems capable of locking on to targets in the 1940s.

After the group accepts the mission to resupply the forward observation post and is ambushed, a man wearing a blue jacket and black pants can be seen in the top right of the background during the firefight.

While the U.S. group carries no visible supply of ammunition and is never shown being resupplied at any time, they manage to shoot continuously throughout the film.

Willoughby gives a target reference but has no map and no idea where he is or what map the pilots are using.

Willoughby contacts the planes on a walkie talkie but has no idea of the frequency they are on.

At 7.5 minutes in, the Lt. salutes the sgt. the sgt. should have saluted first and held it until the Lt. returned the salute.