In Old Oklahoma is better known today by its reissue title, War of the Wildcats. John Wayne heads the cast as oil man Dan Somers, who carries on a bitter feud with his crooked rival Hunk Gardner (Albert Dekker). Furthering the animosity between the two men is schoolteacher-turned-novelist Catherine Allen (Martha Scott), with whom both Dan and Hunk fall in love. The main story and the romantic second story both come to a head when Dan is offered a valuable contract if he can deliver an oil shipment within a specific deadline. Naturally, Hunk does everything he can to keep Dan from fulfilling his contract, resulting in a thrill-packed chase sequence that served as stock footage for many a future Republic western and serial. A pre-Roy Rogers Dale Evans costars as sexy dancehall chanteuse "Cuddles" Walker.