Did you know that camp Douglas in Chicago IL was probably one of the worst union prision camps at that time?I mean sure we here about Andersonville but we never here about what happened in the northern camps.I can't explain it all here but here are some helpful links if you want to learn about camp Douglas.

www.geocities.com/bourbonstreet/2757/issues/camp.htm
www.prairieghosts.com/campd.html