12th Pa., Capt. Richard Gustin.
Brigade loss: South Mountain, k, 32; w, 100 == 132.
Antietam, k, 37; w, 136; m, 2 == 175. Artillery: A, 1st Pa., Lieut. John G. Simpson; B, 1st Pa., Capt. James H. Cooper; C, .5th U. S., Capt. Dunbar R. Ransom.
Artillery loss: Antietam, k, 3; w, 18 == 21.
Second Army Corps, Maj.-Gen. Edwin V. Sumner. Staff loss: Antietam, w, 2.
Escort: D and K, 6th N. Y. Cav., Capts. Henry W. Lyon and Riley Johnson. Loss: Antietam, w, 1.
first division, Maj.-Gen. Israel B. Richardson (mi w), Brig.-Gen. John C. Caldwell, Brig.-Gen. Winfield S. Hancock.
Staff loss: Antietam, w, 2.
First Brigade, Brig.-Gen. John C. Caldwell: 5th N. H., Col. Edward E. Cross; 7th N. Y., Capt. Chas. Brestel; 61st and 64th N. Y., Col. Francis C. Barlow (w), Lieut.-Col. Nelson A. Miles; 81st Pa., Maj. H. Boyd McKeen.
Brigade loss: Antietam, k. 44; w, 268; m, 2 == 314. Second Brigade, Brig.-Gen. Thomas F. Meagher, Col. John Burke: 29th Mass., Lieut.-Col. Joseph H. Barnes; 63d N.