The Mighty Aztec Empire By Chase Gilmond Jan 1, 1200 Aztecs move into a Valley in Metixo Jan 1, 1325 Aztecs Build Tenochtitlan Don't konw exact date. Jan 1, 1325 Aztecs build a temple in the city-center Period: Jan 1, 1400 to Jan 1, 1500 Aztecs expand Empire Jan 1, 1428 Aztecs join with two other city-states called Texcoco and Tlacopan Jan 1, 1453 Levee around Tenochtitlan is built Jan 1, 1500 The Aztecs controlled a vast empire, which stretched from central Mexico to the Atlantic and Pacific coasts and south into Oaxaca. Jan 1, 1502 Montezuma II becomes emperor Jan 1, 1519 Spanish reach Aztecs Jan 1, 1521 Aztecs fall to the Spanish