"Gunmen of the Rio Grande" is a 1964 Western film poster featuring gunfighters and characters associated with the Rio Grande region, a natural border between Mexico and the United States. This movie, typical of the genre, likely depicts stories involving conflict, law enforcement, and the pursuit of justice in the Wild West, as suggested by the title and common themes in western films. The exact plot details or cast members may vary depending on the specific film depicted by this poster.