United States Army > Army of the Potomac


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Commanded by Brigadier General Fitz John Porter

First Division Brigadier General George W. Morrell
First Brigade Colonel James Barnes
Second Brigade Brigadier General  Charles Griffin
Third Brigade Colonel H. S. Lansing (until 9/18)
Colonel T. B. W. Stockton
Second Division Brigadier General George Sykes
First Brigade Lieutenant Colonel R. C. Buchanan
Second Brigade Lieutenant Colonel William Chapman
Third Brigade Colonel Gouverneur K. Warren (BG 11/26)
Third Division Brigadier General Andrew A. Humphreys
First Brigade Brigadier General  E. B. Tyler recreated 9/12
Second Brigade Colonel P. H. Allabach
Artillery Reserve
First Brigade Horse Artillery to Cavalry Division
Second Brigade broken up to 3, 5 & 9 Corps
Third Brigade to 5 Corps Reserve Artillery
Fourth Brigade to 6 Corps
Fifth Brigade broken up to 3 & 9 Corps