Thoburn was supposed to support Mulligan's right flank in the attack, but because of the topography of the battlefield, he became separated from Mulligan and saw little action during the battle. Gordon's Confederates exploited the gap in the Union line to get on Mulligan's right and when Hayes's division broke, Mulligan found himself caught between two Confederate divisions. Mulligan immediately ordered a withdrawal, and was mortally wounded as he tried to rally his troops and prevent a full rout during the retreat. The Confederate infantry pressed the fleeing Federals all the way back through Winchester and the cavalry kept at their heels well into West Virginia.