Warrior people par excellence, the Aztecs carried out a cycle of military campaigns that would lead them to dominate various regions, subjecting their inhabitants to the payment of tributes that went to the coffers of Tenochtitlan, capital of the empire that in its final time reached to have 200.000 inhabitants. The merchants were the ones who carried the products from one place to another, traveling great distances, so that these products could be exchanged by means of barter. But they also served to inform people, to socialize and to do negotiations. Aztec empire. Tenochtitlan. Peoples of Mesoamerica