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