Second Corps, Army of Northern Virginia General Gustavus W. Smith. This unit was also known as the Second Division and was eventually subsumed into general Robert E. Lee's Army of Northern Virginia as a reserve in Maj. Gen. D. H. Hill's Division. When Lee was able to reorganize his army after finishing battles with Union Maj. Gen. George B. McClellan on the peninsula, he created this corps under the command of Lieutenant General Jackson, along with a sister corps under Lt. Gen. James Longstreet. Lee's reorganization was based on his evaluation of the performance of his division commanders during the Seven Days Campaign. General Jackson commanded
Confederate Army of the Potomac Bull Run and attempted to organize an attack but following a brief skirmish Jones' brigade was thrown back due to heavy artillery fire. Both brigades subsequently withdrew back to Bull Run. The two Confederate armies were consolidated into a single army following the battle, retaining the name "Army of the Potomac" and with Johnston in command; Beauregard was initially posted as its second-in-command but he was soon transferred to the Western Theater. The army was spread through northern Virginia to observe the Union Army of the Potomac in Washington, fighting several small skirmishes including the Battle of Ball's Bluff. In