The Aztec government was similar to monarchy where an emperor or king was the primary ruler. Back then they didn't have presidents or democrats and republicans. The Aztec empire was made up of a series of city-states known as altepetl. The Aztecs call their ruler the Huey Tlatoani. The Huey Tlatoani was the ultimate power in land. The Aztecs also believed in their gods, they were strongly about their religion.
