Eleanor Burns has a book that is a Civil War Sampler. Also, you can get the blocks online free if you know the names of them if you just want the blocks of that time frame. El's book has some history of the blocks in her book. It's the Underground Railroad book.
Also, Barbara Brackmann has a blog that has a Civil War Sampler going on. Here is the link:
http://civilwarquilts.blogspot.com/