Around the 1400's or so
By building
they usealliancesto build their empire by using them to agree to other city-states
They collected tribute and through warfare.
The three main factors that helped the Aztecs build an empire were: their strategic military alliances and conquests, their sophisticated agricultural practices that supported a large population, and their efficient tribute system that extracted resources from conquered territories.
They were able to conquer many people in the Valley Of Mexico.
aztecs
Yes, the Aztecs did build a complex network of roads that connected their capital city of Tenochtitlan to other parts of their empire. These roads were used for transportation of goods, communication, and for the movement of the military.
the aztecs organized thousands of workers for their projects.
Aztecs made alliances with nearby city-states, conquered others
a great empire
The Aztecs did in fact have an empire. This empire was actually a very famous empire back in the day.
The Aztecs didn't do this, they built them in present-day Mexico. I did an assignment on this not long ago!:)