failure of Hooker to fight Lee in detail, 143, 144;
Lee's invasion of Pennsylvania, 144-146;
Hooker replaced by Meade, 146;
battle of Gettysburg, 147-149;
failure of Meade to pursue Lee, 149-152;
Bragg's invasion of Kentucky, 154;
battle of Perryville, 154;
Buell replaced by Rosecrans, 155;
battle of Stone's River, 155;
Rosecrans drives Bragg out of Tennessee, 156, 157;