Answer:
Germs killed most of them. The euopeans had been building up immunities for centuries whereas the Native Americans had been sheltered from them. So when the Europeans came over, the germs spread like wildfire.
Explanation:
The Aztecs were around present-day Mexico. They made beautiful cities. They were artistic.
The Incas had an extremely strong military. They controlled more land then anybody else had ever had in that region. They were militaristic.
