Because Cortez came and brought smallpox with him and the Aztecs and Incans had no defense so most of them got sick and died.
Spain and Cortez
Spain conquered the Inca Empire by force of arms.
Gold
the three ancient civilizations that Spain wiped out were the Aztec, Inca, and Maya.
Spain used money gained from the conquest of the Inca to enlarge its army and navy.
The Spanish conquistadores were responsible.
Spain conquered the Inca and Aztec Empires. By the time of European arrival, the Mayan civilization had imploded four centuries prior.
Spain.
Spain
no he did not; Francisco Pizarro González did
Inca
Spain