Butler's only major success as commander of the army was in September 1864 at the Battle of Chaffin's Farm, in which the army took a significant portion of the Confederate works guarding Richmond, including Fort Harrison.
Butlers eneste større succes som kommandør for hæren var i september 1864 i Slaget ved Chaffin's Farm, hvor hæren erobrede en betydelig del af de konfødererede forsvarsværker, som beskyttede Richmond, herunder fort Harrison.