Early Civilization Timeline By jyoung1023 30,000 BCE Natural land bridges started forming 30,000 BCE Asian hunters arrived in the Americas 10,000 BCE Natural land bridges were once again covered with water 7000 BCE People in South America and central Mexico started to plant seeds to grow food Period: 6000 BCE to 2000 BCE Inuits arrived Period: 1300 BCE to 400 BCE Olmec Civilization 1000 BCE First mounds were built Period: 800 BCE to 100 BCE Adena People Period: 300 BCE to 909 Mayan Culture Period: 100 BCE to 500 Hopewell Mound Builders Period: 1 CE to 1300 Anasazi Culture Period: 700 to 1600 Mississippian Civilization 1000 Cahokia established 1100 Aztecs settled in Valley of Mexico 1325 Aztecs moved Tenochtitian Period: 1400 to 1572 Inca Civilization 1492 Christopher Columbus landed in America 1519 Spanish conquistador, Herman Cortes led his soldiers to the Aztec civilization. 1521 The Spaniards defeated the Aztecs 1533 The Spanish invaded