behind AotW

This photograph of General John Buford with four members of his staff is among Civil War Photographs, 1861-1865 at the Library of Congress.

From the print:

left to right: Bvt. Lt. Col. Myles Keogh, Maj. Gen. John Buford, Capt. Peter Penn Gaskell, Capt. C.W. [Craig Wharton] Wadsworth, Lt. Col. A.P. [Albert Payson] Morrow.

Two of these men, General Buford and Captain Myles Walter Keogh, were on General McClellan’s staff at Antietam on 17 September 1862.