During the summer and fall of 1864, Virginia's Shenandoah Valley was one of the most contested regions of the South. Federal armies invaded the Valley three times--twice they were repulsed. This book describes the third campaign, the supreme achievement of the Army of the Potomac's Sixth Corps. One of the most respected units in the Federal Army, the Sixth Corps formed the nucleus of the Federal force that spent several months competing for control of the Valley with a desperate Confederate army, resulting in some of the toughest fighting of the war. Following victories at Winchester and Fisher's Hill the Sixth Corps campaign culminated with a remarkable stand that stopped the attacking enemy and turned what began as a disastrous defeat into a spectacular victory at Cedar Creek.