John Ford's cavalry trilogy. In 'Fort Apache' Colonel Thursday (Henry Fonda) is bitter at having been sent to battle 'digger' Indians, and his textbook methods of warfare appear barbaric and suicidal to his men. Captain York (John Wayne), an officer experienced in Apache warfare, tries to advise Thursday, but his best efforts are in vain. The second film of the trilogy 'She Wore a Yellow Ribbon', sees dutiful cavalry officer Nathan Brittles (Wayne) reluctant to retire in the face of an imminent Native American uprising. His last official task is to escort the commander's wife and her niece to the Sudrow's Wells stagecoach stop, but it proves to be a journey fraught with danger. Finally in the last film 'Rio Grande' Lieutenant Kirby Yorke (Wayne) is stationed at a remote cavalry post, at which his son, Jeff, enlists in order to prove himself to his father. Yorke's ex-wife (Maureen O'Hara) arrives to fetch her son back, but her love for Kirby is rekindled amidst much family tension.