By state name ex. By battle names ex. American Civil War from Virginia Tech's special collections provides access to letters and diaries from Union and Confederate soldiers. Also includes contemporary research by graduate students.
Basic facts includes causes, costs, generals, etc.
Civil War Maps and Civil War Photographs from the Library of Congress American Memory Project. Valley of the Shadow from UVA takes two communities, one Northern and one Southern, through the experience of the American Civil War. The project is a hypermedia archive of thousands of sources for the period before, during, and after the Civil War for Augusta County, Virginia, and Franklin County, Pennsylvania. Sources include letters, newspapers, diaries, photographs, maps, church records, population census, agricultural census, and military records.