In the montage of battle scenes which show the Seventh Cavalry taming the frontier when they operated out of Fort Lincoln are several shots of them which will be repeated during the Little Big Horn battle.
The highest regular Army rank attained by Winfield Scott was actually Major General. Lieutenant General was a brevet (temporary) rank. The First regular Lieutenant General would be Ulysses S. Grant, promoted to the rank in March of 1864. General Scott was also one of three veterans of the War of 1812 still listed in the rolls of the regular Army at the start of the Civil War.
During the final battle, a trooper struggling with an Indian is shot in the back with an arrow by another Indian. The outline of the square block under his clothes into which the arrow was fired can be clearly seen.
In the scene where Mr. Bacon speaks with the preacher as he collects rents, mountains are clearly visible over the rooftops. There are no mountains anywhere near Monroe, Michigan.
Lt. General Winfield Scott: This Custer of yours is insubordinate alright-thank God for it. He's not marching on Round Top. He's attacking Stuart at Hanover!