Warner Bros. Pictures announced the project in August 1956, saying that
John Wayne would star. It was based on a novel by Clay Fisher, not published until April 1957. When the novel came out the
New York Times said it "rates grade A without question". D.D. Beauchamp was hired to write a script. Then, Eliot Asinof was reported as working on the script.
Jack L. Warner assigned Irving Shermer as producer. By early 1959, the project had become a vehicle for Clint Walker, the star of Warner Bros.' hit TV show
Cheyenne and the final script was done by Burt Kennedy, who was under contract to Warner at the time. Walker's co-star was
Edd Byrnes, who had leapt to fame playing "Kookie" on the Warner Bros. detective show
77 Sunset Strip. Filming took place in April and June 1959, partly on location south of
Flagstaff, Arizona, which is now modern-day Sedona, Arizona. "I felt miserable and lost 10 pounds in one month," said Byrnes.
Ray Danton was signed to a long-term contract at Warner Bros. after the film. ==Reception==