Miles's division of Humphrey's corps brought some guns to the bank of Flat Creek, which ran from northeast to southwest across the line of march, and opened fire on the Confederate infantry, which was the rear of Gordon's corps, marching away toward the west. A running battle began at about 9:00 a.m.  between Miles's and De Trobriand's divisions of the II Corps and the much smaller divisions of Brigadier General James A. Walker's and Major General Bryan Grimes from Gordon's Second Corps, with Rooney Lee's cavalry occasionally holding the line for the infantry.