The major facts of the Gettysburg campaign and battle are well known, but controversies about its outcome abound even today. No issue is more contested than that of the whereabouts of the dashing cavalryman, Maj. Gen. J. E. B. Stuart. Author Mark Nesbitt gives a detailed reconstruction of Stuart's actions during the campaign and presents the case that Stuart was not at fault for the loss: He was following orders to the best of his ability. The blame...