Spain, 1518: young caballero Pedro De Vargas offends his sadistic neighbor De Silva, who just happens to be an officer of the Inquisition. Forced to flee, Pedro, friend Juan Garcia, and adoring servant girl Catana join Cortez' first expedition to Mexico. Arriving in the rich new land, Cortez decides to switch from exploration to conquest...with only 500 men. Embroiled in continuous adventures and a romantic interlude, Pedro almost forgets he has a deadly enemy...
| Writing | Lamar Trotti | Writer |
| Directing | Henry King | Director |
| Writing | Samuel Shellabarger | Novel |
| Costume & Make-Up | Ben Nye | Makeup Artist |
| Art | Richard Day | Art Direction |
| Costume & Make-Up | Charles LeMaire | Costume Design |
| Camera | Charles G. Clarke | Director of Photography |
| Editing | Barbara McLean | Editor |
| Art | Thomas Little | Set Decoration |
| Camera | Arthur E. Arling | Director of Photography |
| Production | Darryl F. Zanuck | Executive Producer |
| Production | Lamar Trotti | Producer |
| Art | James Basevi | Art Direction |
| Sound | Alfred Newman | Original Music Composer |
| Sound | Edward B. Powell | Orchestrator |
| Directing | Robert D. Webb | Second Unit Director |
| Visual Effects | Fred Sersen | Visual Effects |
| Sound | Winston H. Leverett | Sound |
| Sound | Roger Heman Sr. | Sound |
