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What are the best sources of information about the history of the American Civil War?
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1.  The Library of Congress has a great collection of books, manuscripts and other primary documents related to the American Civil War.
2.  The National Park Service maintains many historical sites throughout the United States that offer visitors an opportunity to learn more about the Civil War.
3.  The National Archives in Washington D.C.  has a wealth of resources on the war including original letters and diaries from soldiers and civilians alike.
4.  The National Museum of African American History & Culture also offers a comprehensive look at the impact of the Civil War on African Americans.