The 1910 Mexican Revolution is on its way when six brave peasants, known as "Los Leones de San Pablo", decide to join Pancho Villa's army and help end the suffering in their community by assisting in the struggle. Together, they will endure the tragedies and hardships of a civil war.
| Directing | Fernando de Fuentes | Director |
| Writing | Rafael F. Muñoz | Novel |
| Writing | Fernando de Fuentes | Adaptation |
| Writing | Xavier Villaurrutia | Adaptation |
| Production | Alberto J. Pani | Producer |
| Sound | Silvestre Revueltas | Original Music Composer |
| Editing | Joseph Noriega | Editor |
| Art | Mariano Rodríguez Granada | Art Direction |
| Art | Antonio Ruiz | Art Direction |
| Writing | Fernando de Fuentes | Screenplay |
| Sound | Eduardo Fernández | Sound |
| Sound | Rafael Ruiz Esparza | Sound |
| Camera | Jack Draper | Director of Photography |
| Production | Carlos Argüelles | Production Supervisor |
| Production | Celestino Gorostiza | Production Manager |
| Directing | Miguel M. Delgado | Assistant Director |
| Camera | Gabriel Figueroa | Camera Operator |
| Writing | Xavier Villaurrutia | Writer |
