After more of hard and continuous fighting at the Battle of North Anna, and along the Totopotomoy, the corps reached the memorable field where the Battle of Cold Harbor was fought. While at Spotsylvania it had been reinforced by a brigade of heavy artillery regiments, acting as infantry, and by the brigade known as the Corcoran Legion, so that at Cold Harbor it numbered 53,831, present and absent, with 26,900 "present for duty". Its loss at Cold Harbor including eleven days in the trenches, was 494 killed, 2,442 wounded, and 574 missing; total, 3,510. Birney's Division was but slightly engaged.