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 |
| Sound | Leo Shuken | Original Music Composer |
| Costume & Make-Up | Natalie Visart | Costume Design |
| Sound | Gerard Carbonara | Original Music Composer |
| Editing | Anne Bauchens | Editor |
| Production | Cecil B. DeMille | Producer |
| Sound | Victor Young | Original Music Composer |
| Camera | Victor Milner | Director of Photography |
| Production | William LeBaron | Executive Producer |
| Sound | Sigmund Krumgold | Original Music Composer |
| Sound | John Leipold | Original Music Composer |
| Art | Roland Anderson | Art Direction |
| Production | William H. Pine | Associate Producer |
| Art | Hans Dreier | Art Direction |
| Writing | Jack Cunningham | Adaptation |
| Writing | Ernest Haycox | Story |
| Sound | Harry Lindgren | Sound Recordist |
| Visual Effects | Dewey Wrigley | Visual Effects |
| Visual Effects | Farciot Edouart | Visual Effects |
| Crew | Edwin Maxwell | Dialogue Coach |
| Art | A. E. Freudeman | Set Decoration |
| Directing | Arthur Rosson | Second Unit Director |
| Sound | John Cope | Sound Recordist |
| Crew | Gordon Jennings | Special Effects |
| Sound | Loren L. Ryder | Sound Re-Recording Mixer |
