This was Errol Flynn's first western. He always felt miscast in the genre because of his English accent. Although Flynn was born in Tasmania, he used an English accent in films.
Warner Bros. chartered a special 16-car train that transported at least 36 reporters to Dodge City, KS, for the film's premiere. Along the way an unscheduled stop was made in Pasadena so that Olivia de Havilland could leave the train and report for work on Via col vento (1939). The studio also sent a Technicolor crew to film the premiere, which was attended by Franklin D. Roosevelt Jr. and over 70,000 visitors that had come to the city to celebrate the premiere.
The fifth of nine movies made together by Warner Brothers' romantic couple Olivia de Havilland and Errol Flynn.
The barroom brawl was supposedly the largest ever filmed.
Country rock band Pure Prairie League, which had a mid-'70s hit called "Amie" and later employed future country star Vince Gill as lead singer for hits like "Let Me Love You Tonight" and "I'm Almost Ready," took their name from a temperance union portrayed in this film.