As Chamberlain's line was falling back, his First Brigade was reinforced by the 188th New York Volunteer Infantry Regiment and the 155th Pennsylvania Volunteer Infantry Regiment (Zouaves) of Colonel (Brevet Brigadier General) Edgar M. Gregory's Second Brigade.
When they saw these Union reinforcements, the Confederates retreated to their main entrenchments along White Oak Road, abandoning control of the Boydton Plank Road and leaving behind badly wounded men and some others who surrendered [REF].