Culhuacan or Colhuacan was one of the Nahuatl-speaking pre-Columbian city-states of the Valley of Mexico. By tradition, Culhuacan was founded by the Toltecs under Mixcoatl, and that theirs was the first Toltec city (Pohl 1991). The Nahua-speakers agreed that Culhuacan was the first to title their rulers as "speaker" (tlatoani). Nahuatl is a native language of central Mexico. ... The term Pre-Columbian is used to refer to the cultures of the New World in the era before significant European influence. ... The Valley of Mexico is a highlands plateau in central Mexico roughly coterminous with the present-day Distrito Federal and the eastern half of Estado de Mexico. ... The Toltecs (or Toltec or Tolteca) were a Pre-Columbian Native American people who dominated much of central Mexico between the 10th and 12th century AD. Their language, Nahuatl, was also spoken by the Aztecs. ...

Culhuacan survived the fall of Tollan and maintained their prestige until the mid-14th century. Tollan (Stargate) are an advanced human civilization Tollan or Tolan or Tolán is the name used for the capital city of two empires of Pre-Columbian Mesoamerica; first for Teotihuacan, and later for the Toltec capital of Tula. ...

Notably, in 1299, Culhuacan's tlatoani, Cocoxtli, helped the Tepanecs of Azcapotzalco, the Xochimilca and other cities expell the Mexica from Chapultepec. Cocoxtli then gave the Mexica permission to settle in the empty barrens of Tizapan, southwest of Chapultepec, and become vassals of Culhuacan. The Mexica subsequently assimilated into Culhuacan's culture and their soldiers provided mercenaries for its wars. (One primary source for these events is the Cronica Mexicayotl, transcribed in 1609.) A tlatoani was a member of the Aztec nobility. ... The Tepanec are a Mesoamerican people who arrived in the Valley of Mexico in the late 12th or early 13th centuries. ... The word Aztec is usually used as a historical term, although some contemporary Nahuatl speakers would consider themselves Aztecs. ... Chapultepec (Chapoltepēc = at the grasshopper hill in the Nahuatl language) is a large hill on the outskirts of central Mexico City with much significance in Mexican history. ...

In the early 14th century, the vassal Mexica asked for Achitometl's daughter, in order to make her the goddess Yaocihuatl. Unbeknownst to Achitometl, the Mexica actually planned to sacrifice her. As the story goes, during a festival dinner, a priest came out wearing her flayed skin as part of the ritual. Upon seeing this, the king and the people of Culhuacan were horrified and expelled the Mexica. The Mexican found their way onto a small island in Lake Texcoco, where they founded their capital, Tenochtitlan. Yaocihuatl is a Nahuatl word thats used for women that are warriors. ... Lake Texcoco is a lake in Mexico. ... Tenochtitlan, looking east. ...

The Tenochtitlan tlatoani Acamapichtli was a son of the Culhua tlatoani Nauhyotzin's daughter. Still, in 1377 Azcapotzalco subdued Culhuacan in large part with Mexica troops. In 1428, the Mexican Speaker Itzcóatl helped to overthrow Azcapotzalco's hegemony, and accepted the title "Ruler of the Culhua". Acamapichtli was the first tlatoani (king) of the Aztecs of Tenochtitlan. ...