A story of General Custer’s career, starring Errol Flynn and Olivia De Havilland. Though this version is riddled with gratuitous historical inaccuracies, it is good entertainment. Sydney Greenstreet is Winfield Scott, Anthony Quinn is Crazy Horse.
The dvd from Warner Brothers includes a 1942 news reel, and a promotional feature about the Army Medical Corps. Both these are worth watching, to compare with Hollywood’s attitudes today. The cartoon feature is Abbott and Costello vs. a proto-Tweetybird: A Tale of Two Kitties. It’s not really very good.