US History By totallypopular4 38,000 BCE Migration of prehistoric people to USA 10,500 BCE End of the Ice Age 1200 BCE Olmec Society Flourishes 1200 BCE The Ancestral Pueblo People settle 1000 BCE The Adena make the Mound Pyramids 800 BCE Peak of the Adena 500 BCE Peak of the Hopewell farmers 400 BCE Disappearance of Olmecs 400 BCE Rise of the Mayan 300 Hugugam settle in Arizona 700 Decline of the Hopewell 750 Pueblo People start building pueblos 900 Fall of the Mayan 900 The Mississippian people form Cahokia 1000 Leif Eriksson reaches Canada 1100 Rise of the Aztecs 1100 Founding of Cuzco and founding of Inca Empire 1300 Hugugam die out 1300 Pueblo People split into cities 1325 Founding of Tenochtitlan 1487 Bartholomew Dias tries to sail to India 1492 Colombus reaches "India" (America) 1497 Vasco da Gama reaches India 1497 John Cabot explores America for Henry VII 1497 Pedro Alvares Cabral finds Brazil 1500 Arrival of the Apache and Navajo 1500 Aztecs become an empire 1500 Aztecs and Incas invaded by Conquistadors 1500 Arrival of Blackfeet tribe 1502 Amerigo Vespucci finds South America 1503 The Americas are named after Amerigo 1722 The Tuscarora join the Haudenosaunee Confederacy