This film is basically a remake of Gunga Din (1939) set in the American "Wild West". After filming was completed, the producers discovered they needed to secure the rights to the original story. They were forced to pay a large fee to the copyright owners before the film could be released.
The hat Sammy Davis Jr. wore was John Wayne's that Wayne wore in Rio Bravo (1959). Duke loaned it to Davis.
This was the final "Rat Pack" film project to include Peter Lawford. A rift with Frank Sinatra permanently ended their friendship.
Eight of the actors in this movie also appeared in the classic Ocean's Eleven: Frank Sinatra, Dean martin, Peter Lawford, Sammy Davis Jr., Joey Bishop, Henry Silva, Buddy Lester, and Hank Henry.
Features Phillip, Dennis and Lindsay Crosby, who were all sons of Bing Crosby, in supporting roles.