American Civil War
Civil War at the New York Times
Civil War site - Slavery Map
American Civil War as seen from the United Kingdom
Battles of the Civil War - wikipedia
Good link collection, more links
Smithsonian American history timeline
Library of Congress - Civil War photos - maps
The Trent Affair
Atlantic slave trade
American slave traders (1860) - Nathaniel Gordon
National Geographic interactive map
Valley of the Shadow archives
Cultural roots of disunion