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1200 - The Aztecs arrive in the Valley of Mexico
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1350- Causeways and canals are built in Tenochtitlan
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1452- Tenochtitlan suffers from floods
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1440- Moctezuma becomes leader
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1487- Templo Mayor is finished being built
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1519- Cortes arrives to Tenochtitlan with his small army
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1521- Cortes defeats the Aztecs. Disease took most of Aztec population.
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1522- Spanish inslave Aztecs and rebuild the city now known as Mexico City