Once the Aztecs had decided to conquer a particular city, they sent an ambassador from Tenochtitlan to offer the city protection. They pointed out very politely the advantages of being able to trade with the Empire.
Archaeologists for a long time believed the ancient Maya to be gentle and peaceful people. Maya warfare was intense, chronic, and irresolvable, because limitations of food supply and transportation made it impossible for any Maya kingdom to unite the whole region in an empire. The archaeological record shows that wars became more intense and frequent toward the time of the Classic collapse.