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The social, economic, and political history of the United States
United States History Portal | Britannica
The U.S. and its government | USAGov
USA Map | Maps of the United States of America - World Maps
United States - World Factbook Glyph
U.S. state - Wikipedia
United States - National Geographic Kids
United States Facts | Britannica
History of United States | Britannica
Federal government of the United States - Wikipedia