Seven Days Union order of battle

The following United States Army units and commanders fought in the Seven Days battles of the American Civil War. The Confederate order of battle is listed separately.

Abbreviations used

Military rank

• MG = Major General
• BG = Brigadier General
• Col = Colonel
• Ltc = Lieutenant Colonel
• Maj = Major
• Cpt = Captain

Other

• (w) = wounded
• (mw) = mortally wounded
• (k) = killed in action
• (c) = captured

Army of the Potomac

MG George B. McClellan, Commanding

General Staff and Headquarters

• Chief of Staff: BG Randolph B. Marcy
• Chief of Artillery: BG William F. Barry
• Assistant Adjutant General: BG Seth Williams
• Chief Quartermaster: BG Stewart L. Van Vliet
• Escort
  • Oneida (New York) Cavalry
  • 4th United States Cavalry (Companies A & E)
• Provost Marshal General: BG Andrew Porter
  • McClellan Dragoons
  • Sturges' Rifles
  • 93rd New York (Companies A, F, H, & K)
  • 2nd United States Cavalry
  • 8th United States (Companies F & G)
• United States Engineers
  • Battalion United States Engineers
• Engineer Brigade: BG Daniel P. Woodbury
  • 15th New York Engineers
  • 50th New York Engineers

II Corps

BG Edwin V. Sumner

Division	Brigade	Regiments and Others
First Division      BG Israel B. Richardson	1st Brigade BG John C. Caldwell	5th New Hampshire 7th New York 61st New York 81st Pennsylvania
	2nd Brigade (Irish Brigade) BG Thomas F. Meagher Col Robert Nugent	29th Massachusetts 63rd New York 69th New York 88th New York
	3rd Brigade BG William H. French	52nd New York 57th New York 64th New York 66th New York 53rd Pennsylvania 2nd Delaware
	Artillery Cpt George W. Hazard (w)	1st New York Light, Battery B 4th United States, Batteries A and C
Second Division      BG John Sedgwick	1st Brigade Col Alfred Sully	15th Massachusetts 1st Minnesota Massachusetts Sharpshooters, 1st Company 34th New York 82nd New York Minnesota Sharpshooters, 2nd Company
	2nd Brigade (Philadelphia Brigade) BG William W. Burns	69th Pennsylvania 71st Pennsylvania 72nd Pennsylvania 106th Pennsylvania
	3rd Brigade BG Napoleon J.T. Dana	19th Massachusetts 20th Massachusetts 7th Michigan 42nd New York
	Artillery Col Charles H. Tompkins	1st Rhode Island Light, Battery A 1st United States, Battery I
	Artillery Reserve	1st New York Light, Battery G 1st Rhode Island Light, Battery B 1st Rhode Island Light, Battery G
	Cavalry	6th New York (Companies D,F,H and K)

III Corps

BG Samuel P. Heintzelman

Division	Brigade	Regiments and Others
Second Division      BG Joseph Hooker	1st Brigade BG Cuvier Grover	1st Massachusetts 11th Massachusetts 16th Massachusetts 2nd New Hampshire 26th Pennsylvania
	2nd Brigade (Excelsior Brigade) BG Daniel Sickles	70th New York 71st New York 72nd New York 73rd New York 74th New York
	3rd Brigade Col Joseph B. Carr	5th New Jersey 6th New Jersey 7th New Jersey 8th New Jersey 2nd New York
	Artillery	1st New York Light, Battery D New York Light, 4th Battery 1st United States, Battery H
Third Division      BG Philip Kearny	1st Brigade BG John C. Robinson	20th Indiana 87th New York 57th Pennsylvania 63rd Pennsylvania 105th Pennsylvania
	2nd Brigade BG David B. Birney	3rd Maine 4th Maine 38th New York 40th New York 101st New York
	3rd Brigade BG Hiram G. Berry	2nd Michigan 3rd Michigan 5th Michigan 1st New York 37th New York
	Artillery	1st Rhode Island, Battery E 2nd United States, Battery G
	Artillery Reserve Cpt Gustavus A. De Russy	New York Light, 6th Battery New Jersey Light, 2nd Battery 4th United States, Battery K
	Cavalry Col William W. Averell	3rd Pennsylvania

IV Corps

BG Erasmus D. Keyes

Division	Brigade	Regiments and Others
First Division      BG Darius N. Couch	1st Brigade BG Albion P. Howe	55th New York 62nd New York 93rd Pennsylvania 98th Pennsylvania 102nd Pennsylvania
	2nd Brigade BG John J. Abercrombie	65th New York 67th New York 23rd Pennsylvania 31st Pennsylvania 61st Pennsylvania
	3rd Brigade BG Innis N. Palmer	7th Massachusetts 10th Massachusetts 36th New York 2nd Rhode Island
	Artillery	1st Pennsylvania Light, Battery C 1st Pennsylvania Light, Battery D
Second Division      BG John J. Peck	1st Brigade BG Henry M. Naglee	11th Maine 56th New York 100th New York 52nd Pennsylvania 104th Pennsylvania
	2nd Brigade BG Henry W. Wessels	81st New York 85th New York 92nd New York 96th New York 98th New York 85th Pennsylvania 101st Pennsylvania 103rd Pennsylvania
	Artillery	1st New York Light, Battery H New York Light, 7th Battery
	Artillery Reserve Maj Robert M. West	New York Light, 8th Battery 1st Pennsylvania Light, Battery E 1st Pennsylvania Light, Battery H 5th United States, Battery M
	Cavalry Col David McM. Gregg	8th Pennsylvania

V Corps

BG Fitz J. Porter

Division	Brigade	Regiments and Others
First Division      BG George W. Morell	1st Brigade BG John H. Martindale	2nd Maine 18th Massachusetts 22nd Massachusetts 1st Michigan 13th New York 25th New York Massachusetts Sharpshooters, 2nd Company
	2nd Brigade BG Charles Griffin	9th Massachusetts 4th Michigan 14th New York 62nd Pennsylvania
	3rd Brigade BG Daniel Butterfield	12th New York 17th New York 44th New York 16th Michigan Brady's Company Michigan Sharpshooters 83rd Pennsylvania
	Artillery Cpt William B. Weeden	Massachusetts Light, 3rd Battery Massachusetts Light, 5th Battery 1st Rhode Island, Battery C 5th United States, Battery D
	Sharpshooters Col Hiram Berdan	1st United States Sharpshooters
Second Division      BG George Sykes	1st Brigade Ltc Robert C. Buchanan	3rd United States 4th United States 12th United States 14th United States
	2nd Brigade Maj Charles S. Lovell	2nd United States 6th United States 10th United States 11th United States 17th United States
	3rd Brigade Col Gouverneur K. Warren	5th New York 10th New York
	Artillery Cpt Stephen H. Weed	3rd United States, Batteries L and M 5th United States, Battery I
Third Division (Pennsylvania Reserves)      BG George A. McCall (c)      BG Truman Seymour	1st Brigade BG John F. Reynolds (c) Col Seneca G. Simmons Col R. Biddle Roberts	1st Pennsylvania Reserves 2nd Pennsylvania Reserves 5th Pennsylvania Reserves 8th Pennsylvania Reserves 13th Pennsylvania Reserves (Companies A,B,D,E,F and K)
	2nd Brigade BG George G. Meade (w) Col Albert L. Magilton	3rd Pennsylvania Reserves 4th Pennsylvania Reserves 7th Pennsylvania Reserves 11th Pennsylvania Reserves
	3rd Brigade BG Truman Seymour Col Conrad F. Jackson	6th Pennsylvania Reserves 9th Pennsylvania Reserves 10th Pennsylvania Reserves 12th Pennsylvania Reserves
	Artillery	1st Pennsylvania Light, Battery A 1st Pennsylvania Light, Battery B 1st Pennsylvania Light, Battery G 5th United States, Battery C
	Cavalry Col James H. Childs	4th Pennsylvania
	Cavalry Col John F. Farnsworth	8th Illinois

VI Corps

BG William B. Franklin

Division	Brigade	Regiments and Others
First Division      BG Henry W. Slocum	1st Brigade BG George W. Taylor	1st New Jersey 2nd New Jersey 3rd New Jersey 4th New Jersey
	2nd Brigade Col Joseph J. Bartlett	5th Maine 16th New York 27th New York 96th Pennsylvania
	3rd Brigade BG John Newton	18th New York 31st New York 32nd New York 95th Pennsylvania
	Artillery	Massachusetts Light, 1st Battery New Jersey Light, 1st Battery 2nd United States, Battery D
Second Division      BG William F. Smith	1st Brigade BG Winfield S. Hancock	6th Maine 43rd New York 49th Pennsylvania 5th Wisconsin
	2nd Brigade (Vermont Brigade) BG William T. H. Brooks	2nd Vermont 3rd Vermont 4th Vermont 5th Vermont 6th Vermont
	3rd Brigade BG John W. Davidson	7th Maine 20th New York 33rd New York 49th New York 77th New York
	Artillery Cpt Romeyn B. Ayres	1st New York Light, Battery E New York Light, 1st Battery New York Light, 3rd Battery 5th United States, Battery F
	Cavalry	5th Pennsylvania (Companies I and K)
	Cavalry	1st New York

Artillery Reserve

Col Henry J. Hunt

Brigade	Batteries
First Brigade (Horse Artillery) Ltc William Hays	2nd United States, Battery A 2nd United States, Batteries B and L 2nd United States, Battery M 3rd United States, Batteries C and G
Second Brigade Ltc George W. Getty	1st United States, Battery E 1st United States, Battery G 1st United States, Battery K 4th United States, Battery G 5th United States, Battery A 5th United States, Battery K
Third Brigade Maj Albert Arndt	1st Battalion New York Light, Battery A 1st Battalion New York Light, Battery B 1st Battalion New York Light, Battery C 1st Battalion New York Light, Battery D
Fourth Brigade Maj Edward R. Petherbridge	1st Maryland Light, Battery A 1st Maryland Light, Battery B
Fifth Brigade Cpt J. Howard Carlisle	2nd United States, Battery E 3rd United States, Batteries F and K
unattached	1st New York Light, Battery G New York Light, 5th Battery
Siege Train Col Robert O. Tyler	1st Connecticut Heavy Artillery

Cavalry Reserve

Division	Brigade	Regiments and Others
Cavalry Reserve      BG Philip St. George Cooke
	First Brigade Col Richard H. Rush	6th Pennsylvania 5th United States (Companies A,D,H and L)
	Second Brigade Col George A. H. Blake	1st United States (Companies A,C,F and H) 6th United States

Casey's Command

Brigade	Regiments and Others
Casey's Command (at White House Landing)      BG Silas Casey	11th Pennsylvania Cavalry (Companies B,D,F,I and K) 1st New York Light, Battery F 93rd New York (Companies B,C,D,E,G and L)

References

• U.S. War Department, The War of the Rebellion: a Compilation of the Official Records of the Union and Confederate Armies], U.S. Government Printing Office, 1880–1901.]