A great description of the battle of Chancellorsville (famous for Jackson's highly successful flank attack). Author does a very effective job of pointing out in detail how Joe Hooker screwed up by the numbers. What I found most interesting about the book was the author served with the Army of the Potomac (until wounded at Gettysburg) so it was only written less than 20 years after the war. Also there is an addendum where the author responds to the controversy surrounding his point of view on Joe Hooker.