At the end when Winters is talking to Nixon, the bayonet in Winters' belt disappears and reappears between shots.
When Captain Winters leads a charge across the field to attack the Germans, he is out in front of the rest of his men by a sizable amount of space. He reaches the attack point and fires at a young German soldier, then turns to begin firing at the rest of the soldiers and fires again. The camera shot changes after Captain Winters continues fires two shots, he then fires an additional 8 shots and in all he fires 10 shots in a row before reloading. He is firing an M1 Garand, which only holds 8 rounds.
When Luz is doing his "Got a penny?" imitation, his cigarette jumps between his hands. Just before the close-up of his face he lifts his left hand, then in the close-up he's smoking the cigarette from his right hand.
When Winters shoots the single soldier after the red smoke appears, he then fires 9 more shots from his M1. The M1 clip holds only 8 rounds.
In the first combat sequence where Winters and his squad ambush the German machine gun crew, Winters points out individual targets to each man. "First on the right, second on the left", etc. To suggest shooting accuracy, Winters is shown adjusting his rear sight windage knob. This is a factual error. Given night time and the short range (probably 100 yards max), windage adjustment would be useless - for the most part the rear sight would be useless - this is a point and shoot situation firing multiple rounds. Rifles would have been set for what was called "battle sight zero" - the range (elevation) would have been set at 300 yards. If your target was less then 300 yards away, you'd aim low (belly). If the target was over 300 yards away, you'd aim high (head). Winters is shown later (at the river crossing) shooting from the hip at the German in the field. In night time shooting from the prone position, you're essentially doing the same thing, you're pointing your rifle at your target. The low light at night essentially makes the rear sight useless as it would be extremely difficult to line up with the front sight and the intended target.
The name of Warren Muck's home town, Tonawanda, New York, is properly pronounced 'TAH-nuh-WAHN-duh', NOT 'Tone-uh-wahn-da'.
When the men are first called out to deal with the German breakout later known as the Battle of the Bulge, a full moon or nearly full moon is shown. The battle began in mid December, but at this time, there was only a new moon, the full moon not appearing until Friday, December 19, 1944.
The English captain while narrating the events of operation Pegasus, is wearing the US 101st Airborne Division patch on his right shoulder. However, he swam across the river the night before, and it is unlikely he did it in full uniform. He was probably given clothing to wear by the 101st.
When Cpt. Winters is typing his report (12:15), the end-of-line bell rings and he does a carriage return with his left hand. This reveals that the image was flipped horizontally, because carriage returns on English language typewriters are done by moving the carriage from right to left with the writer's right hand. (The director, who collects vintage typewriters, should know better.)
When Winters types the report, a close-up of the keys show that, even though he is typing the correct letters, the typewriter's shift lock is not on, therefore the words he is typing should be lower case, but the next shot show the all caps title of his report.
When Easy company are crossing the river to save the trapped Red Devils, the soldier paddling the boat does not have an oar in his hand.
The British para commander is referred to as a Brigadier General and is wearing a general officer's cap badge. There has been no such rank in the British Army since the 1920s. The equivalent, Brigadier, is not a general officer and wears a different cap badge.