Units of the Army of the Potomac engaged at Seven Pines,
May31 -June 1,1862
(compiled from the Official Records)
Major General George B. McClellan

II Corps
Brigadier General Edwin V. Sumner

First Division: Brigadier General Israel B. Richardson
1st Brigade—Brigadier General Oliver 0. Howard

• 5th New Hampshire

• 61st New York

• 64th New York

• 81st Pennsylvania

2nd Brigade—Brigadier General Thomas Meagher

• 63rd New York

• 69th New York

• 88th New York

3rd Brigade—Brigadier General William H. French

• 52nd New York

• 57th New York

• 66th New York

• 53rd Pennsylvania

Artillery Brigade—Captain George W. Hazzard

• Battery A, 4th U. S. Artillery

• Battery C, 4th U. S. Artillery

• Battery B, 1st New York Light Artillery

• Battery G, 1st New York Light Artillery

Second Division: Brigadier General John Sedgwick

1st Brigade—Brigadier General Willis A. Gorman

• 15th Massachusetts

• 34th New York

• 82nd New York

• 1st Minnesota

• Andrews Sharpshooters

2nd Brigade—Brigadier General William W. Burns

• 69th Pennsylvania

• 71st Pennsylvania

• 72nd Pennsylvania

• 106th Pennsylvania

3rd Brigade—Brigadier General Napoleon J. Dana

• 19th Massachusetts

• 20th Massachusetts

• 42nd New York

• 7th Michigan

Artillery Brigade—Colonel Charles H. Tompkins.

• Battery I, 1st U. S. Artillery

• Battery A, 1St Rhode Island Light Artillery

• Battery B, 1st Rhode Island Light Artillery

• Battery G, 1st Rhode Island Light Artillery

Escort— Company K, 6th New York Cavalry

III Corps
Brigadier General Samuel P. Heintzelman

Cavalry—Colonel William W. Averell

• 2nd Pennsylvania Cavalry

Second Division: Brigadier General Joseph Hooker

1st Brigade—Brigadier General Cuvier Grover

• 2nd New Hampshire

• 1st Massachusetts

• 11th Massachusetts

• 26th Pennsylvania

2nd Brigade—Brigadier General Daniel E. sickles

• 70th New York

• 71st New York

• 72nd New York

• 73rd New York

• 74th New York

3rd Brigade—Brigadier General Francis E. Patterson

• 5th New Jersey

• 6th New Jersey

• 7th New Jersey

• 8th New Jersey

Artillery Brigade—Major Charles S. Wainwright

• Battery H, 1st U. S. Artillery

• Battery D, 1st New York Light Artillery

• 4th New York Battery

• 6th New York Battery

Third Division: Brigadier General Philip Kearny

1St Brigade—Brigadier Charles D. Jameson

• 87th New York

• 57th Pennsylvania

• 63rd Pennsylvania

• 105th Pennsylvania

2nd Brigade—Brigadier General David B. Birney

• 3rd Maine

• 4th Maine

• 38th New York

• 40th New York

3rd Brigade—Brigadier General Hiram G. Berry

• 37th New York

• 2nd Michigan

• 3rd Michigan

• 5th Michigan

Artillery Brigade— Battery G, 2nd U. S. Artillery

• Battery E, 1st Rhode Island Light Artillery

• Battery B, 1St New Jersey Light Artillery

IV Corps Brigadier General Erasmus D. Keyes

Cavalry—Colonel David McM. Gregg

• 8th Pennsylvania Cavalry

Artillery—

• Battery E, 1st US. Artillery 

First Division: Brigadier General Darius N. Couch

1st Brigade—Brigadier General John J. Peck

• 55th New York

• 62nd New York

• 93rd Pennsylvania

• 98th Pennsylvania

• 102nd Pennsylvania

2nd Brigade—Brigadier General J. J. Abercrombie

• 65th New York

• 67th New York

• 23rd Pennsylvania

• 31st Pennsylvania

• 61st Pennsylvania

3rd Brigade—Brigadier General Charles Devens

• 7th Massachusetts

• 10th Massachusetts

• 2nd Rhode Island

• 36th New York

Artillery Brigade—Major Robert M. West

• Battery C, 1st Pennsylvania Light Artillery

• Battery D, 1St Pennsylvania Light Artillery

• Battery E, 1St Pennsylvania Light Artillery

• Battery H, 1St Pennsylvania Light Artillery

Second Division: Brigadier General Silas Casey

1st Brigade—Brigadier General Henry M. Naglee

• 11th Maine

• 56th New York

• 100th New York

• 52nd Pennsylvania

• 104th Pennsylvania

2nd Brigade—Brigadier General Henry W. Wessells

• 96th New York

• 85th Pennsylvania

• 101St Pennsylvania

• 103rd Pennsylvania

3rd Brigade—Brigadier General Innis N. Palmer

• 81st New York

• 85th New York

• 92nd New York

• 98th New York

Artillery Brigade—Colonel Guilford D. Bailey

• Battery A, 1st New York Light Artillery

• Battery H, 1st New York Light Artillery

• 7th New York Battery

• 8th New York Battery

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