Nuño Beltrán de Guzmán served as the Governor of the provinces of Pánuco and Nueva Galicia a decade after Cortés had destroyed the Aztec Empire.  As a conqueror, he succeeded in bringing a vast new territory under the domain of the Spanish Empire.  However, as an administrator, Nuño de Guzmán terrorized both Spaniards and Indigenous people who stood in his way. Eventually, his slave-trading activities brought an end to his reign of terror.