What happened to the Aztecs after the Spanish arrived in Tenochtitlan?

The Aztecs thought that Cortés was a god-king, mistaken for Quetzalcoatl the light skinned, bearded God-King of the Aztecs - the 'Winged God - Feather Serpent 'so they treated him and his soldiers well.

Soon Cortés thought the Aztecs and Montezuma would find out he was not a god, so he held Montezuma hostage and threatened to kill him if he did not do what he wished, though there are many different theories the way Montezuma died, the most popular one is that Montezuma was forced to anger his people or Cortés would kill him himself