The Armies at Gettysburg > The Army of the Potomac

Organization of the 12th Corps of the Federal Army of the Potomac during the Civil War Battle of Gettysburg, July 1-3, 1863. The 12th Corps had 28 infantry regiments and 4 artillery batteries at Gettysburg, organized into two divisions of three brigades each and an artillery brigade.

12th Corps (monument)
Major General Henry Slocum (^ Right Wing) (monument)
Brigadier General Alpheus S. Williamsstrength: 10,700 men, 20 guns
casualties: 205 killed, 810 wounded, 65 missing, 1,080 total

Provost Guard
10th Maine Infantry, Companies A, B & D (monument)
Captain John D. Beardsley

1st Division (monument)
Brigadier General Alpheus S. Williams (^ July 1)
Brigadier General Thomas H. Ruger
strength: 5,255 men
casualties: 95 killed, 405 wounded, 30 missing, 530 total

2nd Division (monument)
Brigadier General John Geary (monument)
strength: 3,965 men
casualties: 110 killed, 395 wounded, 35 missing, 540 total

Artillery Brigade (monument)
Lieutenant Edward D. Muhlenberg
strength: 400 men, 20 guns
casualties: 0 killed, 9 wounded, 0 missing, 9 total

1st New York Artillery, Battery M (monument)
ieutenant Charles E. Winegar
4 10-pounder Parrott Rifles

Pennsylvania Independent Battery E (monument)
Lieutenant Charles A. Atwell
6 10-pounder Parrott Rifles

4th United States Artillery, Battery F (monument)
ieutenant Sylvanus T. Rugg
6 Napoleons

5th United States Artillery, Battery K (monument)
st Lieutenant David H. Kinzie
4 Napoleons