What events caused the end of the inca empire?

Huascar, who considered himself as the heir to the empire started a long civil war that lasted five years until 1532. ... The decline of the Inca Empire started before the Spanish arrived in Inca territory but their arrival accelerated its decline and eventually its fall destroying its civilization.Explanation:

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.