How did the Aztecs spread through Central America?

The Aztecs spread through Central America primarily through military conquests, forming alliances, and engaging in trade. They expanded their empire by dominating neighboring city-states and incorporating them into their political and economic systems. Additionally, their religion and culture played a significant role in unifying conquered peoples under Aztec rule. This expansion reached its peak in the early 16th century, just before the arrival of Spanish conquistadors.