How the Spanish were able to defeat the Aztecs and the Incas?

The Spanish were able to defeat the Aztecs and the Incas primarily due to their superior military technology, such as firearms and steel weapons, as well as the use of horses in battle. They also exploited existing rivalries and divisions among indigenous groups, forming alliances that bolstered their numbers. Additionally, the spread of diseases like smallpox decimated native populations, weakening their ability to resist conquest. Key leaders, such as Hernán Cortés and Francisco Pizarro, played crucial roles in orchestrating these campaigns through strategic deception and psychological warfare.