Pre-Columbian Nahua confederacy in Mexico
Chalco
Chālco was a complex pre-Columbian Nahua altepetl or confederacy in central Mexico.
It was divided into the four sub-altepeme of Tlalmanalco/Tlacochcalco, Amaquemecan, Tenanco Texopalco Tepopolla and Chimalhuacan-Chalco, which were themselves further subdivided into altepetl tlayacatl, each with its own tlatoani (king). The first two of these eventually took on more importance than the other two. Its inhabitants were known as the Chālcatl (singular) or Chālcah (plural).
Text adapted from Wikipedia, CC BY-SA 4.0.