American History Online

American History Online is a comprehensive and authoritative reference to the most important individuals, events, and topics in U.S. history. Spanning more than 500 years of political, military, social, and cultural history, this invaluable reference source is organized by content type, topic, era, and activity. Unique Learning Centers pull forward hand-picked entries within each major era, serving as ideal starting points for research. Thousands of fully hyper-linked entries allow users to follow a topic to related subject entries, biographies, primary source documents, videos, images, maps, and charts.