Old Gringo

American schoolteacher Harriet Winslow (Jane Fonda) goes to Mexico to work as a governess for the Miranda family, and becomes caught up in the Mexican revolution. Mexicans transporting her from Chihuahua, Chihuahua, secretly soldiers of Pancho Villa's army, use her luggage to smuggle weapons to the servants at the Miranda hacienda. The servants in turn aid the attacking revolutionary army of General Tomas Arroyo (Jimmy Smits). During the attack, a sardonic "Old Gringo", American author Ambrose Bierce (Gregory Peck), joins the fighting on the side of the revolutionaries; he operates a railway switch that sends a railroad flatcar laden with explosives to its target.