Drums in the Deep South (1951)
Drums in the Deep South is an American Civil War war film designed and directed by William Cameron Menzies who was production designer of David O. Selznick's Gone With the Wind (1939) and also designed the cave sequences in Selznick's The Adventures of Tom Sawyer (1938). Based on a story by Civil War author Hollister Noble, the film was produced by an independent company King Brothers Productions, filmed in SuperCineColor and released by RKO Pictures in September 1951. B. Reeves Eason directed the second unit.
More at Wikipedia.