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  1. United States - Colonization, Revolution, Constitution | Britannica

  2. History of the United States - Wikipedia

  3. Outline of the history of the United States - Wikipedia

  4. United States | History, Map, Flag, & Population | Britannica

  5. History of the United States | Map and Timeline

  6. US History Timeline: The Dates of the United States' Journey

  7. History of the United States - Simple English Wikipedia, the free ...

  8. history of United States - Encyclopedia Britannica

  9. American History Encyclopedia

  10. U.S. History Primary Source Timeline - Library of Congress