Trivia

Richard Widmark's scenes were shot separately from everyone else's. He insisted on doing everything in his scenes himself (where a stand-in might otherwise be used) such as reverse/over the shoulder shots or just picking up a telephone. Melvyn Douglas was the same.

Robert Aldrich turned down a large salary and a 10% profit stake in A Bridge Too Far (1977) in order to make this film.

Vera Miles' role as the First Lady was deleted from the final release print.

All of the scenes were shot with two cameras running.

Burt Lancaster initially turned the script down when he was first approached about the project, but eventually agreed to do it after Robert Aldrich became attached to the picture.