Rio Grande is a 1950 Western film directed by John Ford and starring John Wayne and Maureen O'Hara. The picture is the third installment of Ford's "cavalry trilogy," following two RKO Pictures releases: Fort Apache (1948) and She Wore a Yellow Ribbon (1949).


Lieutenant Colonel Kirby Yorke (John Wayne) is posted on the Texas frontier with the 2nd U.S. Cavalry Regiment to defend settlers against attacks by marauding Apaches. Colonel Yorke is under considerable pressure due to the Apaches using Mexico as a sanctuary from pursuit, and by a serious shortage of troops in his command. The action of the movie is set in the summer of 1879 ("fifteen years after the Shenandoah").