Stansel's, McGowan's and Hunton's brigades attacked both most of Ayres's division and all of Crawford's division which quickly had joined the fight as it erupted. In this initial encounter, two Union divisions of over 5,000 men were thrown back across Gravelly Run by three Confederate brigades. Brigadier General (Brevet Major General) Charles Griffin's division and the V Corps artillery under Colonel (Brevet Brigadier General) Charles S. Wainwright finally stopped the Confederate advance short of crossing Gravelly Run. Adjacent to the V Corps, Major General Andrew A. Humphreys conducted diversionary demonstrations and sent two of Brigadier General (Brevet Major General) Nelson Miles's brigades from his II Corps] forward. They initially surprised and, after a sharp fight, drove back Wise's brigade on the left of the Confederate line, taking about 100 prisoners.