Actually when Stonewall Jackson was struck down by friendly fire, it doomed the Northern Army of Virginia, General Lee, and the South. He was the great strategist of the Army and very aggressive on the battlefield. General Jackson would have pressed the Union Army through Gettysburg and taken the high ground that General Ewell gave Mead's Army after the first day of battle. Longstreet dragged his feet because he was on the wall at Fredericksburg and knew what would happen at Gettysburg and that ill advised Pickett's Charge. What a waste of manpower and war material! That mess lay at Lee's feet just like the mess this year is laid at Kelly's feet.