Mercenaries of the Rio Grande

In Mercenaries of the Rio Grande, Dr. Karl Sternau, the personal physician to Count Bismarck, returns to Mexico during the French occupation. His mission is to deliver a letter of encouragement from U.S. President Lincoln to Mexican president Benito Juarez. This narrative intertwines themes of war, freedom, and a treasure hunt in a historical context involving the Mexica, or Aztec, culture.

As part of the Karl Sternau Collection, this film features notable performances from actors such as Lex Barker and Gérard Barray. With a runtime of 101 minutes, it showcases the rich tapestry of adventure and Western genres from the 1960s. The film is produced by Serena, Avala Film, Franco London Films, and CCC Filmkunst, adding to its production value.