On September 12, 1862, the U.S. War Department issued General Orders, No. 129, ending the existence of the Army of Virginia and establishing the status of the twelve existing army corps at that time.
General Orders, No. 129.
War Dep’t, Adjutant General’s Office
Washington, September 12, 1862.
I. – The President directs that the First, Second, and Third Corps of the “Army of Virginia,” announced in “General Orders,” No. 103, be hereafter designated the First, Eleventh, and Twelfth. The several Army Corps will now stand as follows:
The First, Second, Third, and Fourth, as arranged in “General Orders,” No. 101, of March 18, 1862, from the Headquarters, Army of the Potomac.
The Fifth, Sixth, Seventh, Eighth, and Ninth, as announced in “General Orders,” No. 84, of July 22, 1862, from this office.
The Tenth as announced in “General Orders,” No. 123, of September 3, 1862, from this office.
The Eleventh and Twelfth, the same as the First and Second Corps” Army of Virginia.”
II. – By direction of the President Captain Lloyd Beall, 2d U.S. Infantry, is hereby dismissed the service.
By Order of the Secretary of War:
L. THOMAS, Adjutant General