Teotihuacan is expanding into an empire! The city is growing beyond its old borders, military expeditions project its influence all the way to the Yucatan Peninsula. Fighting men become settlers, new resources are discovered, and the wealth brought by obsidian draws in new discoveries.

The devastating force of the eruption of Xitle completely buried and destroyed Cuicuilco and Copilco, both significant civic and religious cities. The survivors have scattered across Mesoamerica, many settling in and around Teotihuacan. The rapid infusion results in accelerated growth of Teotihuacan and leads to the adoption of new technologies as Teotihuacan establishes itself as a seat of power in the region.