Why were the Spanish able to conquer the Aztec empire and the Inca empire?

What is the history behind the Spanish Steps in Rome? How did the slaves in ancient Greece get paid? What does the greek god hepheastus represent? What adventure does polydectes suggest that perseus undertaken? How did the Incans keep records? What is the first instance of classifying in human history? Why didn't Zeus and his brothers get along? What is the greek name for eye? How did Alexander miles did? What did a hoplite wear? How did Odysseus and Achilles try to avoid the call for war? What is the word origin for Hades the greek god? Where is pomeii? Who did the Greeks blame for the existence of evil? Where is the arrow by which Achilles was killed? What are the powers of he Greek Goddess Nemesis? Who discovered the letter a? Where did the small Athenian fleet defeat the great Persian fleet? Was Achilles justified in his wrath against Agamemnon and his subsequent withdrawal from battle? Who was Greek god Apollo's allies and friends?