Ronald Reagan was a serious breeder of horses during this period of his career and insisted on riding his favorite mare in this film. The horse had to be expressed by railroad to the location, and according to co-star Rhonda Fleming, while the studio horses wilted in the desert, Reagan's mount was fresh for every take.
The producers of this movie, William H. Pine and William C. Thomas, were known in the industry as "The Dollar Bills" because they made movies so quickly and efficiently that their films seldom, if ever, lost money. This was their most expensive production to date, mainly because of its cast of higher-paid stars. It was also their biggest hit.
As the Indians were shot off of their horses, they were instructed to loop around the set, get on other horses, and come back on as different Indians.
Some modern sources claim that this film is a remake of Paramount's Guerreiros da África (1935), but the two pictures are not related.