"Lux Radio Theater" broadcast a 60 minute radio adaptation of the movie onApril 13, 1942 with Gary Cooper, Paulette Goddard and Preston Foster reprising their film roles.
Gatling Guns really were used at Fish Creek, Cutknife Hill and Batoche during the rebellion on which this story is very loosely based. But the federal government were trying them out "on approval". One gun's operator was a Gatling company agent, and also a captain of the Connecticut National Guard.
One of over 700 Paramount Productions, filmed between 1929 and 1949, which were sold to MCA/Universal in 1958 for television distribution, and have been owned and controlled by MCA ever since.
One of the films included in "The Fifty Worst Films of All Time (and how they got that way)" by Harry Medved and Randy Lowell.