Yohualtepec
Yohualtepec, also written Ihualtepec, was a Mixtec hill town in the Mixteca Baja of northwestern Oaxaca. Its district included Huajuapan and Silacayoapam, the latter owing allegiance to Coixtlahuaca.
Aztec armies overran the region and defeated its rulers in 1458, after which towns around Yohualtepec paid tribute. The Mixtecs submitted to Francisco de Orozco's expedition in 1521, and Huajuapan was refounded in 1561. During the independence war, royalists besieged Huajuapan for 111 days until Valerio Trujano relieved it with José María Morelos in 1812.