Continuity: When Charles Bronson steps out on the balcony of the nazi villa a second time (after having to hide), he drops his rope (to get on the roof), and when we see him from another angle, he drops it again.

Continuity: When Waterslaw and Jefferson each shoot a soldier through a window, no glass seems to break until we see each soldier fall out through the glass.

Factual error: When the Major shoots the rope out from under the slow soldier, the rounds should have gone through the floor but did not. There aren't even marks on the floor.

Continuity: In the scene where the four remaining guys finally cross over the bridge in the half-track, John Cassavetes gets shot dead by a Nazi soldier. The next shot shows the vehicle just crossing over the bridge again.

Continuity: At the parachute training school,the dirty dozen have fairly thick beards. Later when Col. Breed pays a visit to their camp, their beards are just stubble.

Continuity: In the wargames scene, right after the group comes down the hill with the live artillery fire, they change arm bands from blue to red. In the next scene when they pick up the stolen jeep, everyone is wearing blue arm bands again (when they went over the hill, they were in red territory so would not have changed back to blue while walking to meet the jeep). Then when they crash the jeep, they are back in the red arm bands for the remainder of the scene.

Other: After Lee Marvin turns the hookers loose on the prisoners, the Army psychiatrist quips "Do you think those guys realize tomorrow is Mother's Day?" Subsequently, when Marvin is being berated by Robert Webber for holding the drunken party in which the hookers participated, Webber notes the date of the party was April 14 and 15. Mother's Day is celebrated in May.

Factual error: The film opens with a US soldier being hanged, the lever is operated by a US Noncom. Wrong. The US forces were allowed to hang their own on British soil, but only if a British executioner was used. The executioner would have been our own Mr Pierrepoint.

Factual error: Charles Bronson is beaten up by two airborne NCOs in the latrine on the airbase. One of them is wearing a rank badge with two chevrons and one rocker. No such rank badge has ever existed in the US Army.

Revealing: When the tank/truck driven by Marvin is crossing the stone bridge at the end, they are met by a small German gun vehicle, which they run off of the bridge. The camera angle changes to below the bridge and you see the German vehicle fall from the side of the bridge into the water below. If you look at the bridge material that shatters you can see pieces of wood and hollow areas where obviously it's not real stone.

Continuity: Lee Marvin is shot in the right shoulder while driving the halftrack away from the bombed Nazi Villa. He places his left hand over the wound which becomes almost totally covered in blood. The camera pans off the truck and then back, and his left hand, still over the wound, is clean.

Continuity: When Lee Marvin first meets the dirty dozen, Charles Bronsons'character is introduced as Wladislaw, T. Later he is called Joseph during training.

Continuity: After Donald Sutherland finishes viewing the soldiers at the parachute school the dirty dozen march right past Robert Ryan. The very next scene shows them just starting to march past him again.

Continuity: In the end scene when everyone is getting ready to escape in the German halftrack, the Major notices that the vehicle is attached to an artillery gun. He looks back over his left shoulder but in the next shot, a split second later, he looks over his right.

Continuity: Outside the chateau Donald Sutherland is met by the German soldier who uses his cigarette to lite his own. The German soldier is then shown walking away with the camera facing him and Sutherland exhaling smoke. The next immediate cut shows a front shot of Sutherland but he's not exhaling smoke.

Continuity: In the scene where Lee Marvin enters John Cassavete's cell, we see them from ceiling angle. During this scene we also see that the guard is closing the door behind Marvin. The next shot is taken in the cell with the camera pointing at Marvin. Here the guard has not yet closed the door.

Other: There is a lot of shooting with automatic weapons, and a lot of Germans fall - but there is a remarkable lack of bullet holes anywhere; even in such tight quarters as the bell tower, where bullet holes should have appeared.