How did the Aztecs gets so much land?

The Aztecs expanded their territory primarily through military conquest and strategic alliances. They formed a powerful triple alliance with the city-states of Texcoco and Tlacopan, which enabled them to dominate neighboring regions. Additionally, the Aztecs employed a tribute system that ensured economic control over conquered lands, allowing them to sustain their empire and support further expansion. Their skilled military tactics and the use of technology, such as the atlatl, also contributed to their success in warfare.