From 1861 to 1865, the American union was broken as brother fought brother in a Civil War that remains a defining moment in our nation's history. Its causes and consequences, including the continuing struggle for civil rights for all Americans, reverberate to this day. From the battlefields to the homefront, the cost of the war was steep…its lessons eternal.
http://www.nps.gov/civilwar/index.htm
http://www.nps.gov/civilwar/index.htm