The article "Legendary Cowboys and Gunslingers Who Defined the Wild West" from BBC's HistoryExtra highlights the lives of 13 influential figures of the Old West, from notorious outlaws like Jesse James and Billy the Kid to celebrated lawmen like Wyatt Earp and Wild Bill Hickok. These individuals shaped the history of the American frontier through their daring adventures, law enforcement, and infamous acts, becoming icons that continue to capture the imagination of the modern world.