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The Aztecs left their homeland of Aztlan in northern Mexico and began heading south
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The city of Tenochtitlan is founded. It will become the capital of the Aztec Empire. The location is picked by the priests because it is where they see the foretold sign of an eagle holding a snake while standing on a cactus.
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The first dominant ruler of the Aztecs, Acamapichtli, comes into power. They call their ruler the Tlatoani which means "speaker".