By 3 pm, Union General George Crook advanced Colonel Isaac Duval's division through the Huntsberry Farm fields on the north bank of Red Bud Run while Colonel Joseph Thoburn's division moved to the western edge of the First Woods on the south bank and waited for Duval to appear. Duval's advance drove the remaining Confederate cavalry and horse artillery from the farm, but General John B. Gordon deployed part of his command against the threat, and heavy bullets, shot, shell, and shrapnel struck the attacking Federals. Duval's men pushed down the slope expecting a quick victory, only to be halted by a swampy stretch of Red Bud Run known to them as the morass. With Duval stalled, Thoburn attacked Gordon on the south bank, forcing Confederate resistance in two directions, and his men pressed through artillery and musketry to reach the woods as the enemy broke and ran. Duval's men then struggled through the morass to join the attack, and Union commander General Philip H. Sheridan ordered a general assault and committed the 6th Corps, setting the stage for Union victory at Winchester.