This document provides an overview of early American history from the pre-Columbian period through the colonial era. It discusses how the first Americans migrated to North America across the Bering Strait during the last Ice Age. It then summarizes the major indigenous civilizations that existed in North and Mesoamerica prior to European contact, including the Aztec and Inca Empires. The document next examines the motivations and activities of the major European colonial powers in North America, including exploration, conquest of native peoples, and the establishment of colonies. It provides brief summaries of the founding and economies of the 13 original colonies.