Ramrod (1947)

Ambitious Connie Dickason (Veronica Lake), daughter of wealthy rancher Ben Dickason (Charlie Ruggles), loses her sheep rancher beau when he is unable to stand up to bullying Frank Ivey (Preston Foster), a cattle baron. Adding the sheep ranch to the Dickason property, Connie hires amiable but tough overseer Dave Nash (Joel McCrea) -- but no sooner has he arrived when Ivey attacks and burns Connie's ranch. The resulting range war causes several deaths and exposes Connie's own ruthless streak.