Answer :
Final answer:
Alliances with resentful native peoples and smallpox introduction were key to Aztec conquest.
Explanation:
Alliances with tens of thousands of native peoples who resented Aztec rule and the smallpox that entered the valley of Mexico with the Spanish were factors as important as Spanish military force in the conquest of the Aztec. The resentment towards the Aztec rule among various native groups and the devastating impact of smallpox on the Aztec population significantly contributed to the downfall of the Aztec Empire.
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