You mean hundreds of Spanish soldiers with superior technology allied with tribes that were subjugated and enslaved by other Native American tribes?

The Spaniards did not do it alone. This is a fact very easy to prove. It always shocks me to see people in North America complaining about Spaniards, when in North America there is less than 1% native Americans, the rest were exterminated, ethnic cleansed. In most hispanic countries, native and mixed people are over 70% of the population.

The Spanish invaders relied as much on diplomacy as on violence. They formed alliances with local groups who were opposed to the Aztec and Inca empires.

You mean 10's of millions of natives?