The beginning of the Inca civilizationThe Incas settle in Cusco Valley
The peak of the IncaThe Incan civilization had 12 million people and extended from the border of Ecuador and Columbia to Santiago, Chile.
Smallpox came to the Inca empire.The smallpox epidemic was brought to the Inca empire by Spanish conquistadors. The native people had no resistance to it.
The Inca WarHalf brothers Huáscar and Atahualpa went to war over the throne. Atahualpa eventually won the battle. This war greatly weakened the empire.
Decline of the Inca civilization