Aztec Timeline By scpor250 Period: 1300 to 1521 Aztec time period 1325 Aztec develop the city of Tenochtitlán 1350 Aztecs begin to build causeways and canals 1375 First dominant ruler of Aztecs, Acamapichtli is established. 1427 Itzcoatl becomes the fourth ruler of Aztecs. 1428 Aztec Empire is formed with a 3 way alliance The Texcocans and tacubans pair up with the Aztecs to defeat the tepanecs 1440 Montezuma 1 becomes the fifth leader of the Aztecs Period: 1440 to 1469 Montezuma rules and greatly expands the empire 1452 Tenochtitlan is damaged by a great flood Next few years are filled with famine and starvation 1487 The Templo Mayor is finished 1502 Montezuma The 2nd becomes ruler. 1519 Spanish conquistadors take Montezuma II hostage, Spaniards are driven out but Montezuma is killed. 1521 Aztecs are defeated by the Spaniards.