EXCELLENT book. Totally fiction (except obvious non-fiction history), but really well-written. Even the descriptions of horrors in the battles are so well written that, while being horrified, make one feel he's there. Written from the perspective of slaves as well as plantation owners, it encompasses several story lines (five major/minor characters) and follows them to completion.
The thread holding them together is intriguing--a girl working for the WCA who interviews slaves about their memories. She meets a woman who she believes is white only to discover that the woman is a mulatto slave who has lived the life of a white woman for over fifty years. Incredibly fascinating.