How the West Was Won is a 1962 American epic Western film directed by Henry Hathaway, John Ford and George Marshall, produced by Bernard Smith, written by James R. Webb, and narrated by Spencer Tracy. Originally filmed in true three-lens Cinerama with the according three-panel panorama projected onto an enormous curved screen, the film features an ensemble cast formed by many cinema icons and newcomers, including Carroll Baker, Lee J. Cobb, Henry Fonda, Carolyn Jones, Karl Malden, Gregory Peck, George Peppard, Robert Preston, Debbie Reynolds, James Stewart, Eli Wallach, John Wayne and Richard Widmark. The supporting cast features Brigid Bazlen, Walter Brennan, David Brian, Ken Curtis, Andy Devine, Jack Lambert, Raymond Massey as Abraham Lincoln, Agnes Moorehead, Harry Morgan as Ulysses S. Grant, Thelma Ritter, Mickey Shaughnessy, Harry Dean Stanton, Russ Tamblyn and Lee Van Cleef.

Epic films have large scale, sweeping scope, and spectacle. The term is slightly ambiguous, sometimes designating a film genre and at other times simply big-budget films. Like epics in the classical literary sense, it is often focused on a heroic character. An epic's ambitious nature helps to set it apart from other genres such as the period piece or adventure film.