US History by Era

General Sites:

• American Local History Network
  (collection of independent web sites of state and local history)
• American Memory from the Library of Congress
  (search engine for rich primary source collections)
• Discoverers Web
  (all voyages of discovery and exploration, not just to Americas)
• From Revolution to Reconstruction (and afterwards)
  (hypertext on American History, University of Groningen, The Netherlands)
• History Matters
  (by American Social History Project/Center for Media and Learning of CUNY and the Center for History and New Media at George Mason University, for high school and college teachers of U.S. history surveys)
• HistoryNet
  (mainly military, mainly United States)
• National Archives and Record Administration, Exhibit Hall
  (online exhibits of the national archives)
• Smithsonian Museum of American History
  (museum information - including permanent and temporary exhibit information)
• U.S. Army Center of Military History
  (history of the army provided by the army)
• U.S. Historical Documents Archive
  (substantial texts reproduced, though without citation)