Answer :
Answer:
After a three-month siege, Spanish forces under Hernán Cortés capture Tenochtitlán, the capital of the Aztec empire. Cortés' men leveled the city and captured Cuauhtémoc, the Aztec emperor. So the downfall was mostly on the Spanish.
Explanation:
There are many factors that led to the decline of the Aztec Civilization such as sacrifices, disease and the Spanish conquest . Sacrifices had a big impact on the aztec population. thousands of people were killed in order to please god.