Final answer:
The Aztec Empire controlled the Valley of Mexico.
Step-by-step explanation:
The name of the region that the Aztec Empire controlled was the Valley of Mexico.
The Valley of Mexico, also known as the Basin of Mexico, is located in the southern part of Mexico and is surrounded by mountains.
The Aztecs built their capital city, Tenochtitlan, in the Valley of Mexico, which was a very strategic location as it provided access to trade routes and natural resources.
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