Which of the following is not a reason the Spanish were able to defeat the Aztecs and incas

There is no definitive list of reasons why the Spanish were able to defeat the Aztecs and Incas, as the conquest involved a complex combination of factors. However, among the commonly cited reasons are:

1. Technological superiority: The Spanish had superior weaponry such as guns, cannons, and steel weapons, which the Aztecs and Incas did not possess.

2. Disease: The indigenous populations were severely impacted by diseases brought by the Spanish, such as smallpox, to which they had no immunity. This caused massive population decline and weakened their resistance.

3. Indigenous allies: The Spanish were able to form alliances with indigenous groups, who were enemies of the Aztecs and Incas. These allies provided vital support, including additional troops and intelligence.

4. Political divisions: The Aztec and Inca empires were not unified and faced internal rivalries. The Spanish exploited these divisions and formed alliances with dissatisfied indigenous groups.

5. Psychological warfare: The Spanish, led by figures like Hernán Cortés (Aztecs) and Francisco Pizarro (Incas), used intimidation tactics, captured leaders, and utilized their advanced armor and weaponry to instill fear in the native populations.

From the options provided, the answer would be "Lack of indigenous allies." The Spanish were able to secure alliances with indigenous groups, which played a significant role in their military successes.

One possible cause that the Spanish were able to defeat the Aztecs and Incas was due to the superior military technology possessed by the Spanish, such as guns, cannons, and steel armor.