Trivia

In 1964 it was announced that King Vidor would direct.

Reportedly one of Dwight D. Eisenhower favorite books.

Final film of Johnny Mack Brown.

Final film of Jean Parker.

DeForest Kelley's character is supposed to be a young, hotheaded, Billy the Kid type, and is called "the Kid" throughout, but at 45, Kelley was actually older than Rory Calhoun, John Russell, and Gene Evans, who played his grizzled, older partner.