Answer
Xoconosco in Chiapas marked the southernmost extent of the Aztec Empire during the reign of Moctezuma. This region, located in present-day Mexico, was conquered by the Aztecs in the 15th century and became an important source of cacao, cotton, and other valuable goods for the empire. The conquest of Xoconosco further expanded Aztec influence and control over Mesoamerica, solidifying their position as a dominant power in the region.