 This long expedition resulted in the discovery, by Carvajal, of a mountain pass that allowed him to achieve his goal and enabled him to discover the lands that later become Nuevo Reino de León.After that expedition was completed, Carvajal was sent to chastise hostile Indian bands at the mouth of the Río Bravo (Rio Grande).He claimed to have punished the natives responsible for the massacre of 400 castaways from three ships wrecked on the coast en route to and from Spain.