In the Postclassic period Nahuan languages diversified and spread, carried by the culture commonly known as Toltec. In the early Postclassic period feuds between royal lineages in the Yucatán Peninsula caused the forefathers of the Itza' to move south into the Guatemalan jungle. In northwestern Oaxaca speakers of Mixtec and Chocho-Popolocan languages built successful city-states, such as Teotitlan del Camino, which did not fall under Nahuan subjugation. Speakers of Otomian languages (Otomi, Mazahua and Matlatzinca) were routinely displaced to the edges of the Nahuan states. The Otomi of Xaltocan, for example, were forcibly relocated to Otumba by the early Aztec empire.