United States Army > Army of the Potomac > 12th Corps


< to September • October 1862 • to November >

Commanded by:
Brigadier General George Gordon
(to October 20)
Brigadier General Alpheus S. Williams

First Brigade Colonel J. F. Knipe
5th Connecticut Infantry Regiment Captain Henry W. Daboll
10th Maine Infantry Regiment
28th New York Infantry Regiment Captain William H. H. Mapes (to 10/6)
Colonel Edwin F Brown
46th Pennsylvania Infantry Regiment Lt. Colonel J.L. Selfridge
124th Pennsylvania Infantry Regiment Major Isaac L. Haldeman to 2 Brig. (below)
125th Pennsylvania Infantry Regiment Colonel Jacob Higgins to 2 Brig. (below)
128th Pennsylvania Infantry Regiment Major Joel B. Wanner
Second Brigade Colonel George L. Andrews (10/3 – 10/6)
Brig. Gen. Thomas L. Kane
organized 10/20
20th Connecticut Infantry Regiment Colonel Samuel Ross
3rd Maryland Infantry Regiment Lt. Colonel Joseph Sudsburg (Col. 10/24) from 2 Div., 2 Brig.
123rd New York Infantry Regiment Colonel Archibad L. McDougall from New York 9/5
127th New York Infantry Regiment Colonel William Gurney from Def. Washington, Abercrombie’s Div.; to 4 Brig. (below)
137th New York Infantry Regiment Colonel David Ireland from New York 9/27, to 4 Brig. (below)
138th New York Infantry Regiment Colonel Joseph Welling from New York 9/27, to 4 Brig. (below)
140th New York Infantry Regiment Colonel Patrick O’Rorke from Defences of Washington
to 2 Div., 2 Brig.
145th New York Infantry Regiment Colonel Edward L. Price from New York 9/30; to 2 Div., 2 Brig.
149th New York Infantry Regiment Colonel Henry A. Barnum from Defences Washington, Casey’s Div. 9/26; to 4th Brig. (below)
124th Pennsylvania Infantry Regiment Colonel Joseph W. Hawley from 1 Brig. (above)
125th Pennsylvania Infantry Regiment Colonel Jacob Higgins from 1 Brig. (above)
Third Brigade Colonel Thomas H. Ruger (to 10/20)
Brig. Gen. George H. Gordon
27th Indiana Infantry Regiment Colonel Silas Colgrove
2nd Massachusetts Infantry Regiment Colonel George L. Andrews
13th New Jersey Infantry Regiment Colonel Ezra A. Carman
107th New York Infantry Regiment Colonel Robert Van Valkenburgh (dis. 10/9)
Colonel Alexander S. Diven
29th Pennsylvania Infantry Regiment Captain Samuel M. Zulich
3rd Wisconsin Infantry Regiment Captain Thomas H. Ruger
Fourth Brigade  Colonel George L. Andrews  organized 10/6, dissolved 10/26
127th New York Infantry Regiment Colonel William Gurney from 2 Brig. (above); to Def. Washington, Abercrobie’s Div., 3 Brig.
137th New York Infantry Regiment Colonel David Ireland from 2 Brig. (above)to 2 Div. 3 Brig.
138th New York Infantry Regiment Colonel Joseph Welling from 2 Brig. (above); to Def. Washington, Haskin’s Div., 2 Brig.
149th New York Infantry Regiment Colonel Henry A. Barnum from 2 Brig. (above); to 2 Div., 3 Brig.
Artillery
1st New York Artillery, Battery K from 1 Div.
1st New York Artillery, Battery M Capt. George W. Cothran
4th United States Artillery, Battery F Lieutenant Edward D. Muhlenberg