Ronald Reagan played Custer in Santa Fe Trail in 1940.  Others
include Bugles in the Afternoon (1952); Tonka (1958), a Disney film
about a horse who is the only survivor on the Cavalry side; The Great
Sioux Massacre (1965); Custer of the West, (1967), starring Robert
Shaw.  Leslie Nielsen played him on TV, in something called The
  I don't actually know all this on my own - I just looked it up in
Halliwell's Filmgoer's Companion.
                                                        Stephen Brophy