|Albert Sailhorst wrote:
Just for kicks, I got the following information from http://www.moviemistakes.com/
In the battle for Fredricksburg you can see streaks in the sky from jets.
In the Battle of Bull Run, you can see that they use the same shot twice. It is a wide panoramic shot of the two armies. You see two explosions, one in the middle, and the second by the tree on the right.
In one scene, General Lee and his lieutenants celebrate Christmas of 1862 with a rousing rendition of Silent Night. Unfortunately, the English lyrics, by John Freeman Young, were not yet written. Young penned the lyrics the following year, and it was still some years later before they were known well enough for such a spontaneous sing-along to occur
A.P. Hill was promoted to Major General in May 1862, but during the Battle of Chancellorsville in May 1863 he is introduced as 'Brigadier General A.P. Hill'.
The Confederate camp before the July 1861 Battle of Bull Run has shelter tents (AKA pup tents). These tents were first used by the Union army in late spring 1862. Conversely, the Union Army of the Potomac at Chancellorsville in May of 1863 is using common tents - the kind replaced by the shelter tent a year earlier.
In 1861, neither Stonewall Jackson nor Robert E. Lee had heavy beards. Lee grew his after his resignation, and Jackson grew his during his campaigns
Albert Sailhorst, Scott's Battery
I think the main reason Lee had a beard at the beginning was to not confuse some of the audience. It seems like a minor detail to me anyway.
Personally, I don't think any of these "mistakes" are that big of a deal. The biggest mistake was to include some of the Jim Lewis scenes and others at the expense of cutting out Antietam. Will the Director's Cut ever see the light of day?