Dr. Karl Sternau, the personal physician of the count Bismarck, who spent much of his youth in Mexico, is sent back to that country during the occupation by French troops in the service of the Austrian 'Emperor' Maximilian, to carry an encouraging letter from U.S. President Lincoln to the nationalist Mexican president Benito Juarez.
| Directing | Robert Siodmak | Director |
| Writing | Karl May | Novel |
| Writing | Ladislas Fodor | Screenplay |
| Writing | Robert A. Stemmle | Screenplay |
| Writing | Georg Marischka | Screenplay |
| Production | Götz Dieter Wulf | Producer |
| Sound | Erwin Halletz | Original Music Composer |
| Editing | Walter Wischniewsky | Editor |
| Production | Artur Brauner | Producer |
| Art | Hertha Hareiter | Production Design |
| Camera | Siegfried Hold | Director of Photography |
| Art | Kosta Krivokapić | Production Design |
| Art | Otto Pischinger | Production Design |
| Art | Veljko Despotović | Art Direction |
| Art | Miodrag Mirić | Art Direction |
| Costume & Make-Up | Edith Almoslino | Costume Design |
| Directing | Stevan Petrović | Assistant Director |
| Art | Milan Todorović | Art Direction |
