Jackson had achieved victory at minor expense. The Confederate Army sustained 286 casualties (39 killed, 247 wounded), mostly from the fighting on Maryland Heights, while the Union Army sustained 12,636 (44 killed, 173 wounded, 12,419 captured). It was the largest surrender of Federal forces during the Civil War, and the largest number of United States troops to surrender until the fall of Bataan in the Philippines during World War II. The Union garrison also surrendered 13,000 small arms, 200 wagons, and 73 artillery pieces. The list of captured artillery pieces included one 50-pounder Parrott rifle (spiked), six M1841 24-pounder howitzers, four 20-pounder Parrott rifles, eight M1841 12-pounder field guns (2 spiked), four 12-pounder Napoleons (2 spiked), six M1841 6-pounder field guns, two 10-pounder Dahlgren guns (spiked), 10 3-inch Ordnance rifles, and six 3-inch James rifles.
