Someone was saying on Youtube that Horse Soldiers was the only time John Ford actually dealt with the Civil War but that's of course forgetting this sequence which he directed in this 60s widescreen 'cinerama' epic. John Wayne plays Sherman in the hours after the battle of Shiloh. It is a dark and downbeat sequence, but still worth remembering. If you watch the trailer there seems to be an epic battle scene which I don't remember being in the movie - maybe I'm wrong searching on the web I can't find anything about it. Deleted scenes page
Wiki on the movie.