Thomas Jonathan "Stonewall" Jackson (January 21, 1824 – May 10, 1863) was a Confederate general during the American Civil War, and one of the best-known Confederate commanders after General Robert E. Lee. His military career includes the Valley Campaign of 1862 and his service as a corps commander in the Army of Northern Virginia under Robert E. Lee. Confederate pickets accidentally shot him at the Battle of Chancellorsville on May 2, 1863, which the general survived, albeit with the loss of an arm to amputation. However, he died of complications of pneumonia eight days later. His death was a severe setback for the Confederacy, affecting not only its military prospects, but also the morale of its army and of the general public.