However, Jones immediately attacked, scattering Purcell's men, and killing Vaughan; by 10:00 am, the castle was back in his control. Ormond ordered his troops into battle formation, but Jones continued the assault, sending his cavalry around his flanks, and capturing the artillery train. Although his advance was briefly checked by a regiment under Colonel John Gifford, Ormond's left disintegrated without firing a shot, and by midday, the fighting was over. Dillon withdrew to Drogheda, his retreat covered by 1,000 cavalry under Sir Thomas Armstrong, an experienced Royalist officer.