Civil War concentration camps
http://www.ihr.org/jhr/v02/v02p137_Weber.html

Andersonville Prison
http://www.pointsouth.com/csanet/andersonville.htm

Wirz trial
http://www.pointsouth.com/csanet/andersonville2.htm

Archeology at Andersonville
http://www.cr.nps.gov/seac/andearch.htm