what contributed the most toward hernán cortés's first victory against the aztecs?

cortés had learned the local languages.

the aztecs were weakened by a smallpox epidemic.

tenochtitlán was not equipped to keep out invaders.

a native tribe allied with the spaniards to defeat the aztecs.

What are your thoughts about " the attacking on the twin towers". in your own words a little paragraph its for a project i am doing and i want to get intel from other people so that i can put it on my poster. for anyone who gives me there opinion on it : ) enter you name when you type the paragraph more than one person to respond.