Trivia

Rhonda Fleming suffered a severe back injury on the set when she tried a stunt by herself, falling from a horse on an uphill move. She suffered for much of the rest of her life.

Rodd Redwing, who plays a Native American in the film, was also a technical advisor and firearms expert. He taught Glenn Ford how to draw, cock, aim and fire a gun in one fifth of a second. Ford could do it in half a second and was considered an expert in his own right at fast draw.

Prologue: "New Mexico territory, 1865--The war between the states is in its last stages. A few remaining Confederate sympathizers called 'Copperheads' are putting up a secret last ditch fight. Renegades, outlaws, deserters from both armies pillage and raid. It is a period of burned ranches and looted wagon trains, of ambush and murder, with no man in the territory safe from the rising tide of violence."