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 Shenandoah Northern Virginia, with their merged army using the name "Army of the Potomac"; Johnston retained command of the army, with Beauregard remaining as second in command until his transfer to the western theater. Army of the Shenandoah: General Joseph E. Johnston Confederate Army of the Shenandoah The Army of the Shenandoah was an army of the Confederate States of America during the American Civil War; it was organized to defend the Shenandoah Valley of Virginia in the early months of the war. The army was transferred to reinforce the Confederate Army of the Potomac at the First Battle of Bull