What was one stragedy the Aztecs used to expand their empire?

One strategy the Aztecs used to expand their empire was through military conquest and the formation of strategic alliances. They initially allied with neighboring city-states, such as Texcoco and Tlacopan, to strengthen their military power. Once established, they launched campaigns to conquer rival territories, using a combination of warfare and intimidation to subdue enemies. Additionally, they demanded tribute from conquered areas, which helped consolidate their control and resources.