Mercenaries of the Rio Grande

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.

• Ladislas FodorScreenplay
• Erwin HalletzOriginal Music Composer
• Robert SiodmakDirector
• Georg MarischkaScreenplay
• Robert A. StemmleScreenplay

• Lex BarkerDr. Karl Sternau
• Gérard BarrayCount Alfonso di Rodriganda y Sevilla
• Rik BattagliaCaptain Lazoro Verdoja
• Michèle GirardonJosefa
• Alessandra PanaroRosita Arbellez
• Theresa LorcaKarja
• Ralf WolterAndreas Hasenpfeffer
• Fausto TozziBenito Juarez
• Hans NielsenDon Pedro Arbellez
• Gustavo RojoLieutenant Potoca
• Kelo HendersonFrank Wilson
• Jean-Roger CaussimonMarshal Bazaine