United States Army > Army of the Potomac


< to June • July 1862 • to August >

Commanded by Brigadier General Fitz John Porter

First Division

Brigadier General John H. Martindale (to 7/10)
Colonel James Barnes
2nd Maine Infantry Regiment Colonel Charles W. Roberts
18th Massachusetts Infantry Regiment Colonel James Barnes (^ 7/10)
22nd Massachusetts Infantry Regiment Colonel Jesse A. Grove
32nd Massachusetts Infantry Regiment Colonel Francis J. Parker from Mil. Dist. Washington
1st Michigan Infantry Regiment Colonel Horace S. Roberts
13th New York Infantry Regiment Colonel Elisha G. Marshall
25th New York Infantry Regiment Colonel Charles A. Johnson
Second Brigade Brigadier General Charles Griffin
9th Massachusetts Infantry Regiment Colonel Thomas Cass
4th Michigan Infantry Regiment Colonel Dwight A. Woodbury (k 7/1)
14th New York Infantry Regiment Colonel James McQuade
62nd Pennsylvania Infantry Regiment Colonel Jacob B. Sweitzer
Third Brigade Brigadier General Daniel Butterfield
16th Michigan Infantry Regiment Captain Thomas Berry
Colonel Thomas Stockton
12th New York Infantry Regiment Colonel Henry A. Weeks
17th New York Infantry Regiment Colonel H. Seymour Lansing
44th New York Infantry Regiment Colonel Stephen W. Stryker (to 7/4)
Colonel James O. Rice
83rd Pennsylvania Infantry Regiment Colonel Strong Vincent
Sharpshooters
1st United States Sharpshooters Colonel Hiram Berdan
Division Artillery
3rd Massachusetts Battery
5th Massachusetts Battery
1st Rhode Island Artillery, Battery C
5th United States Artillery, Battery D

Second Division

Brigadier General George Sykes
First Brigade Lieutenant Colonel Robert C. Buchanan
3rd United States Infantry Regiment
4th United States Infantry Regiment
12th United States Infantry Regiment
14th United States Infantry Regiment
Second Brigade Lieutenant Colonel William Chapman
2nd United States Infantry Regiment
6th United States Infantry Regiment
10th United States Infantry Regiment
11th United States Infantry Regiment
17th United States Infantry Regiment
Third Brigade Colonel Gouveneur K. Warren
5th New York Infantry Regiment
10th New York Infantry Regiment
1st Connecticut Heavy Artillery to Army Siege Artillery
Division Artillery
3rd United States Artillery, Batteries L&M
5th United States Artillery, Battery I

Third Division

Brigadier General Truman Seymour 
First Brigade Colonel R. B. Roberts (to 7/5)
Colonel William Sinclair
1st Pennsylvania Reserves Colonel Richard B. Roberts (after 7/5)
2nd Pennsylvania Reserves Colonel William McCandless
5th Pennsylvania Reserves
6th Pennsylvania Reserves  from 3 Brig. (below)
Second Brigade Colonel A. L. Magilton
3rd Pennsylvania Reserves Colonel Horatio G. Sickel
4th Pennsylvania Reserves
7th Pennsylvania Reserves Colonel Elisha B. Harvey
8th Pennsylvania Reserves Colonel George S. Hays
11th Pennsylvania Reserves Colonel Thomas F. Gallagher
Third Brigade Colonel Conrad F. Jackson
6th Pennsylvania Reserves Colonel William Sinclair  to 1 Brig. (above)
9th Pennsylvania Reserves
10th Pennsylvania Reserves Colonel John S. McCalmont
12th Pennsylvania Reserves Colonel John H. Taggart
13th Pennsylvania Reserves Colonel Hugh McNeil
Division Artillery
Battery A, 1st Pennsylvania Artillery
Battery B, 1st Pennsylvania Artillery Captain James H. Cooper
Battery G, 1st Pennsylvania Artillery
Battery C, 5th United States Artillery Captain Dunbar H. Ransom

Artillery Reserve

Colonel Henry Hunt
First Brigade Horse Artillery
2nd United States Artillery, Battery A
2nd United States Artillery, Batteries B&L
2nd United States Artillery, Battery M
3rd United States Artillery, Batteries C&G
Second Brigade 
1st United States Artillery, Battery E
1st United States Artillery, Battery G
1st United States Artillery, Battery K
4th United States Artillery, Battery G
5th United States Artillery, Battery A
5th United States Artillery, Battery K
Third Brigade
1st New York Artillery Bn., Battery A Captain Thomas H. Bates
1st New York Artillery Bn., Battery B Captain Rufus T. Pettit
1st New York Artillery Bn., Battery C
1st New York Artillery Bn., Battery D Captain Thomas W. Osborn
Fourth Brigade
Maryland Artillery, Battery A
Maryland Artillery, Battery B
Fifth Brigade
2nd United States Artillery, Battery E
3rd United States Artillery, Batteries F&K
Unattached
5th New York Independent Battery