Reasons for Spain's success in invading Mexico and Peru?

Answer 1

• Superior technology: muskets, cannons, horses and iron plate armor against spears and wood clubs.

• Chicanery: Pizarro used the Incan civil war to his advantage; Cortes had the Malintzin to work for him as translator and adviser against the Aztecs.

• Disease: all Europeans brought with them smallpox, and none of the Native Americans had immunity against such disease, resulting in a dramatic loss of life (up to 95% of the continental population, by some accounts).