The Army of Northern Virginia’s greatest victory, out numbered 2-1, came at a great price…

Lee risked dividing his forces 'retaining two divisions to focus Hooker's attention, while Stonewall Jackson marched the bulk of the Confederate army west across the front of the Federal line to a position opposite its exposed right flank. Jackson executed this daring and dangerous maneuver throughout the morning and afternoon of May 2. Striking two hours before dusk, Jackson's men routed the astonished Federals in their camps. In the gathering darkness, amid the brambles of the Wilderness, the Confederate line became confused and halted at 9 p.m. to regroup. 

Riding in front of the lines to reconnoiter, Stonewall Jackson was accidentally shot and seriously wounded by his own men. Later that night, his left arm was amputated just below the shoulder. 

The Confederates suffered 14,000 casualties, while inflicting 17,000. But the most damaging loss to the Confederacy was the death of Lee's "right arm," Stonewall Jackson, who died of pneumonia on May 10 while recuperating from his wounds.