Continuity: In the opening, the spy is watching Union troops at dawn. He rides to Longstreet's headquarters and gets there in broad daylight. They then ride to Lee's headquarters and when they get there it is dawn again. Two sunrises in one day...

Factual error: Colonel Vincent tells Colonel Chamberlain that the 20th Maine Inf. is the extreme left of the Union line, but in reality there was another regiment, the 19 Michigan, which was to their left. They were moved before the action began, but left behind about 60 skirmishers.

Continuity: Pickett's charge moved from west to east and was made late in the afternoon. When Pickett rides down the line to encourage his men before the attack, it is clear from the shadows that the scene was filmed early in the morning.

Continuity: The mane on Lee's favorite horse, Traveler, changes from gray to white to gray.

Factual error: The real Confederate General Lewis A. Armistead was quite shy of hair at the front of his head, yet Richard Jordan, who plays him in the movie, has a full head of hair.

Factual error: Colonel Chamberlain didn't order the bayonet charge. It was his second in command, Spear. Chamberlain just followed along.

Continuity: During one of the scenes where Longstreet is talking with Lee, I think on the third day, Longstreet's beard is quite a bit shorter than it was on the previous days.