At roughly the 86-minute mark, the famous Wilhelm Scream can be heard when a cowboy is struck with a tomahawk.
The scenes of the Indians crossing a river and attacking is footage taken from La carga de los jinetes indios (1953).
Virginia Mayo (Celia Gray) starred in Grandes horizontes (1957) the year before, also directed by Gordon Douglas.
A couple of the movie posters show Clint Walker with two holsters and pistols. At no point in the movie does he wear a holster and pistol on his left side.