Why did the spanish conquer the Aztecs and Inca empires?

The Spanish conquered the Aztec and Inca empires primarily due to a combination of superior military technology, such as firearms and horses, and the political instability within these empires. Additionally, the Spanish exploited existing rivalries and discontent among indigenous groups, who often allied with the conquistadors against their rulers. The spread of diseases like smallpox also decimated indigenous populations, weakening resistance to conquest. Ultimately, the Spanish ambition for wealth, land, and resources drove their conquests in the Americas.