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The center of the Aztec civilization was the Valley of Mexico, a huge, oval basin about 7,500 feet above sea level. The Aztecs were formed after the Toltec civilization occurred when hundreds of civilians came towards Lake Texcoco. In the swamplands there was only ....

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.... Aztecs grew their food. The Aztec Empire included many cities and towns, especially in the Valley of Mexico. The early settlers built log rafts, then covered them with mud and planted seeds to create roots and develop more solid land for building homes in this marshy land. Canals were also cut out through the marsh so that a typical Aztec home had its back to a canal with a canoe tied at the door. In the early 1400s, Tenochtitlan joined with Texcoco and Tlacopan, two other major cities in the Valley of Mexico. Tenochtitlan became the most powerful member of the alliance. Montezuma I ruled from 1440 to 1469 and conquered large areas to the east and t ....