Sergeant Charles D. Owen, promoted to lieutenant at Point of Rocks, Maryland; promoted to captain at Darnestown, Maryland.
Sergeant Francis A. Smith, promoted to lieutenant at Darnestown, Maryland.
Sergeant Henry Newton, promoted to lieutenant at Darnestown, Maryland. Left the battery at Falmouth, Virginia, sick.
Corporal Charles M. Read, promoted to sergeant; killed at Antietam, Maryland.
Corporal Charles H. Clark, promoted to sergeant; promoted to lieutenant at Darnestown, Maryland.
Corporal Nathan T. Morse, killed in Washington, D. C.
Corporal Gamaliel L. Dwight, promoted to sergeant; promoted to lieutenant at Poolesville; promoted to captain at Coal Harbor, Virginia.
Corporal William A. Sabin, promoted to sergeant; promoted to lieutenant at Poolesville, Maryland.
Corporal H. Vincent Butler, left the battery at Falmouth, Virginia, having received a commission in the navy.
Corporal James B. Buffum, promoted to sergeant; left the battery at Falmouth, Virginia, sick.