Jack Roper, who plays the part of a Bouncer in DAKOTA, is actually a well known boxer who had fought Joe Louis for the World Heavyweight boxing championship on April 17, 1939. Jack had fought James Braddock and Jack Dempsey and many other heavyweights of the time. He had 9 "first round" knockouts and a boxing record of 54-44-9 and a total of 27 knockouts in his career.
John Wayne later admitted that he had Carl Foreman blacklisted from Hollywood. Foreman was author of the original story.
Three of the cast members, Grant Withers (Slagin), Paul Hurst (Captain Spotts), and Ona Munson [Jersey], would later take their own lives in the 1950s.
Actress Ona Munson was borrowed from Warner Brothers for this production.