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
Fourth Corps, Army of Northern Virginia Commanded by temporary Lt. General Anderson, it was made up of units that before had served around Richmond and Petersburg as part of General Beauregard's Department of North Carolina and Southern Virginia. The Fourth Corps spent the winter of 1864/5 encamped around Petersburg as part of the Army of Northern Virginia. In April the Army of the Potomac, under General Ulysses Grant, broke through the defences and successfully concluded the siege of Richmond, initiating the start of the Appomattox Campaign. The Fourth Corps retreated with the rest of General Lee's Army but was largely destroyed in the Battle of Sailor's