The stalemate was broken by the arrival of the Union brigade under Brig. Gen. George A. Custer. His attack flanked the Confederates on both ends of the line. As Butler's men fled to the rear, his reserve regiment, the 7th South Carolina, counterattacked in an attempt to maintain the line. The superior Union numbers and firepower—the Michiganders were armed with Spencer repeating rifles—carried the day. The Union troopers pursued the retreating Confederates with enthusiasm. Butler eventually rallied his men at Old Cold Harbor and Torbert's men bivouacked about 1.5 miles northeast of the intersection.