Who did Aztecs controlled the most powerful empire in?

The Aztecs controlled the most powerful empire in Mesoamerica during the 14th to 16th centuries, primarily in what is now central Mexico. Their empire, known as the Triple Alliance, was formed with the city-states of Tenochtitlán, Texcoco, and Tlacopan, allowing them to dominate extensive territories through military conquest and strategic alliances. The Aztec civilization was marked by advanced agricultural practices, impressive architectural achievements, and a complex social structure. However, their empire ultimately fell to Spanish conquistadors led by Hernán Cortés in the early 16th century.