The Guns of Fort Petticoat (1957)
The Guns of Fort Petticoat is a 1957 Technicolor Western produced by Harry Joe Brown and Audie Murphy for Columbia Pictures. It was based on the 1955 short story "Petticoat Brigade" by Chester William Harrison (1913–1994) that he expanded into a novelization for the film's release. It was directed by George Marshall and filmed at the Iverson Movie Ranch and at Old Tucson. The working title of the film was Petticoat Brigade; screenwriter and television director Walter Doniger was originally set to have directed the film. The fictional story tells the tale of an Army deserter training a disparate group of women to be Indian fighters climaxing in a Battle of the Alamo type action.
More at Wikipedia.