Early American Civilization TimeLine By mckenzielorio Period: 30,000 BCE to 10,000 BCE Natural land bridges form Period: 10,000 BCE to 10,000 BCE Natural Land Bridges flood Period: 3000 BCE to 1200 BCE Mound Builders lived in eastern US Period: 1438 BCE to 1572 BCE Inca Civilization living period Period: 1428 BCE to 1428 BCE Three Way Alliance between Aztecs and Texoccans Period: 1420 BCE to 1420 BCE First Aztec City Built Period: 1300 BCE to 400 BCE Olmec people lived off Gulf Coast Period: 1200 BCE to 1521 BCE Aztec People Lived in Central America and Mexico Period: 1200 BCE to 1572 BCE Incas lived in South America/along Andes Period: 1100 BCE to 1541 BCE Mississippians lived Mississippi/Ohio Valley Period: 1000 BCE to 1000 BCE First Mounds from Mound Builders Found Period: 1000 BCE to 1000 BCE Cahokia lived along Mississippi River Period: 700 BCE to 1600 BCE Mississippian Civilization living period Period: 400 BCE to 1517 BCE Mayans came to Central America Period: 300 BCE to 900 BCE Mayan Civilization living period Period: 300 BCE to 1521 BCE Aztec Civilzation living period Period: 200 BCE to 500 BCE Hopewell People were Mound Builders Period: 1 BCE to 1300 BCE Anasazi lived n Four Corners Period: 1 BCE to 1300 BCE Anasazi Civilization living period Period: 1500 to 1500 Europeans showed up