1100 - The Aztecs leave their homeland of Aztlan in northern Mexico and begin their journey south. Over the next 225 years the Aztecs will move many times until they finally settle down at the city of Tenochtitlan.
1200 - The Aztecs arrive in the Valley of Mexico. 1250 - They settle in Chapultepec, but are forced to leave by the Culhuacan tribe.
1325 - 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.
1350 - The Aztecs begin to build causeways and canals around Tenochtitlan.
1375 - The first dominant ruler of the Aztecs, Acamapichtli, comes into power. They call their ruler the Tlatoani which means "speaker".
1427 - Itzcoatl becomes the fourth ruler of the Aztecs. He will found the Aztec Empire.
1428 - The Aztec Empire is formed with a triple alliance between the Aztecs, the Texcocans, and the Tacubans. The Aztecs defeat the Tepanecs.
1440 - Montezuma I becomes the fifth leader of the Aztecs. His rule will mark the height of the Aztec Empire.
1440 to 1469 - Montezuma I rules and greatly expands the empire.
1452 - The city of Tenochtitlan is damaged by a great flood. The next few years are filled with famine and starvation.
1487 - The Templo Mayor (Great Temple of Tenochtitlan) is finished. It is dedicated to the gods with thousands of human sacrifices.
