One of the last bills signed by President Lincoln authorizes pushing the Union Pacific Railroad across the wilderness to California. But financial opportunist Asa Barrows hopes to profit from obstructing it. Chief troubleshooter Jeff Butler has his hands full fighting Barrows' agent, gambler Sid Campeau; Campeau's partner Dick Allen is Jeff's war buddy and rival suitor for engineer's daughter Molly Monahan. Who will survive the effort to push the railroad through at any cost?
| Directing | Cecil B. DeMille | Director |
| Writing | Walter DeLeon | Screenplay |
| Writing | C. Gardner Sullivan | Screenplay |
| Writing | Jesse Lasky Jr. | Screenplay |
| Production | Cecil B. DeMille | Producer |
| Production | William LeBaron | Executive Producer |
| Production | William H. Pine | Associate Producer |
| Sound | Sigmund Krumgold | Original Music Composer |
| Sound | John Leipold | Original Music Composer |
| Sound | Gerard Carbonara | Original Music Composer |
| Sound | Leo Shuken | Original Music Composer |
| Sound | Victor Young | Original Music Composer |
| Camera | Victor Milner | Director of Photography |
| Editing | Anne Bauchens | Editor |
| Art | Roland Anderson | Art Direction |
| Art | Hans Dreier | Art Direction |
| Costume & Make-Up | Natalie Visart | Costume Design |
| Writing | Jack Cunningham | Adaptation |
| Writing | Ernest Haycox | Story |
| Directing | Arthur Rosson | Second Unit Director |
| Crew | Gordon Jennings | Special Effects |
| Visual Effects | Farciot Edouart | Visual Effects |
| Visual Effects | Dewey Wrigley | Visual Effects |
| Sound | Harry Lindgren | Sound Recordist |
| Sound | John Cope | Sound Recordist |
| Crew | Edwin Maxwell | Dialogue Coach |
| Art | A. E. Freudeman | Set Decoration |
| Sound | Loren L. Ryder | Sound Re-Recording Mixer |
