Seven Days Union order of battle

The following Union Army units and commanders fought in the Seven Days Battles (from June 25 to July 1, 1862) of the American Civil War. Order of battle compiled from the army organization-return of casualties during the battle[1] and the reports.[2][3] The Confederate order of battle is listed separately.

Organization of the Union Army of the Potomac during the Seven Days Battle of the American Civil War

Abbreviations used

Military rank

MG = Major General
BG = Brigadier General
Col = Colonel
Ltc = Lieutenant Colonel
Maj = Major
Cpt = Captain
Lt = Lieutenant
Sgt = Sergeant

Other

Army of the Potomac

MG George B. McClellan, Commanding

General Staff and Headquarters

General Staff

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

General Headquarters

Escort
- Oneida (New York) Cavalry: Cpt James B. McIntyre
- 4th United States Cavalry (Companies A & E): Cpt James B. McIntyre
Provost Marshal General: BG Andrew Porter
- McClellan Dragoons: Maj Alfred Pleasonton
- Sturges' Rifles: Maj Granville O. Haller
- 93rd New York (Companies A, F, H, & K): Maj Granville O. Haller
- 2nd United States Cavalry: Maj Alfred Pleasonton
- 8th United States (Companies F & G): Cpt Royal T. Frank; Lt Eugene Carter
United States Engineers
- Battalion United States Engineers: Cpt James C. Duane
Engineer Brigade: BG Daniel P. Woodbury
- 15th New York Engineers: Col John McLeod Murphy
- 50th New York Engineers: Col Charles B. Stuart

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: Ltc Samuel G. Langley; Cpt Edward E. Sturtevant 7th New York: Col George W. von Schack 61st New York: Col Francis Channing Barlow 81st Pennsylvania: Col Charles F. Johnson (w - Glendale); Ltc Eli T. Conner (k - Malvern Hill); Maj H. Boyd McKeen
	2nd Brigade[4] BG Thomas F. Meagher Col Robert Nugent BG Thomas F. Meagher	29th Massachusetts: Col Ebenezer W. Pierce (w - White Oak Swamp); Ltc Joseph H. Barnes 63rd New York: Col John Burke (w); Ltc Henry Fowler; Cpt Joseph O'Neill 69th New York: Col Robert Nugent 88th New York: Col Henry M. Baker; Maj James Quinlan
	3rd Brigade BG William H. French	2nd Delaware: Ltc William P. Bailey; Cpt David L. Stricker 52nd New York: Col Paul Frank 57th New York: Col Samuel K. Zook 64th New York: Col Thomas J. Parker 66th New York: Col Joseph C. Pinckney 53rd Pennsylvania: Col John R. Brooke
	Artillery Cpt George W. Hazzard (mw - White Oak Swamp)	Battery B, 1st New York Light Artillery: Cpt Rufus D. Pettit Battery A & Battery C, 4th U.S. Artillery: Cpt George W. Hazzard ('mw June 30), Lt Rufus King, Jr.
Second Division BG John Sedgwick (w - Glendale)	1st Brigade Col Alfred Sully	15th Massachusetts: Ltc John W. Kimball 1st Minnesota: Col Stephen Miller 34th New York Volunteer Infantry Regiment: Col James A. Suiter 82nd New York Volunteer Infantry Regiment (Also known as the 2nd Militia); Col Henry W. Hudson 1st Company, Massachusetts Sharpshooters:[5] Cpt John Saunders 2nd Company, Minnesota Sharpshooters:[6] Cpt William F. Russell
	2nd Brigade BG William W. Burns	69th Pennsylvania: Col Joshua T. Owen 71st Pennsylvania: Ltc William G. Jones 72nd Pennsylvania: Col De Witt C. Baxter 106th Pennsylvania: Col Turner G. Morehead
	3rd Brigade BG Napoleon J.T. Dana	19th Massachusetts: Col Edward W. Hinks (w - Glendale); Cpt Edmund Rice; Ltc Arthur F. Devereux 20th Massachusetts: Col William Raymond Lee 7th Michigan: Col Ira R. Grosvenor 42nd New York: Col Edmund C. Charles (w&c); Ltc James J. Mooney
	Artillery Col Charles H. Tompkins	1st Rhode Island Light, Battery A: Cpt John A. Thompkins Battery I, 1st U.S. Artillery: Lt Edmund Kirby
	Artillery Reserve	Battery G, 1st New York Light Artillery:[7] Cpt John D. Frank 1st Rhode Island Light, Battery B: Cpt Walter O. Bartlett 1st Rhode Island Light, Battery G: Cpt Charles D. Owen
	Cavalry	6th New York Cavalry (Companies D, F, H and K): : Ltc Duncan McVicar

III Corps

BG Samuel P. Heintzelman (w - Glendale)

Division	Brigade	Regiments and Others
Second Division BG Joseph Hooker	1st Brigade BG Cuvier Grover	1st Massachusetts: Col Robert Cowdin 11th Massachusetts: Col William Blaisdell 16th Massachusetts: Col Powell T. Wyman (k - Glendale); Ltc George A. Meacham (w); Maj Daniel S. Lamson 2nd New Hampshire: Col Gilman Marston 26th Pennsylvania: Ltc George D. Wells
	2nd Brigade BG Daniel Sickles	70th New York Infantry Regiment: Maj Thomas Holt 71st New York Infantry Regiment: Col George B. Hall 72nd New York Infantry Regiment: Col Nelson Taylor 73rd New York Infantry Regiment: Cpt Alfred A. Donalds 74th New York Infantry Regiment: Col Charles K. Graham
	3rd Brigade Col Joseph B. Carr	5th New Jersey: Maj John Ramsey 6th New Jersey: Col Gershom Mott 7th New Jersey: Col Joseph W. Revere; Cpt Henry C. Bartlett 8th New Jersey: Maj William A. Henry 2nd New York: Ltc William A. Olmsted
	Artillery	Battery D, 1st New York Light Artillery: Cpt Thomas W. Osborn 4th New York Light Artillery: Lt Joseph E. Nairn Battery H, 1st U.S. Artillery: Cpt Charles H. Webber
Third Division BG Philip Kearny	1st Brigade BG John C. Robinson	20th Indiana: Col William L. Brown 87th New York: Ltc Richard A. Bachia 57th Pennsylvania: Ltc Elhanon W. Woods 63rd Pennsylvania: Col Alexander Hays 105th Pennsylvania: Col Amor A. McKnight, Ltc William W. Corbet, Cpt Calvin A. Craig
	2nd Brigade BG David B. Birney	3rd Maine: Ltc C. A. L. Sampson, Maj Edwin Burt 4th Maine: Col Elijah Walker 38th New York: Col J. H. Hobart Ward 40th New York: Ltc Thomas W. Egan 101st New York: Col Enrico Fardella
	3rd Brigade BG Hiram G. Berry	2nd Michigan: Maj Louis Dillman, Cpt William Humphrey 3rd Michigan: Ltc Ambrose A. Stevens, Maj Byron R. Pierce 5th Michigan: Maj John D. Fairbanks (mw - Glendale), Cpt Judson S. Farrer 1st New York: Col Garrett Dyckman 37th New York: Col Samuel B. Hayman
	Artillery	1st Rhode Island Light, Battery E: Cpt George E. Randolph Battery G, 2nd U.S. Artillery: Cpt James Thompson
	Artillery Reserve Cpt Gustavus A. De Russy	6th New York Light Artillery: Cpt Walter M. Bramhall New Jersey Light, 2nd Battery: Cpt John E. Beam (k - Malvern Hill), Lt John B. Monroe Battery K, 4th U.S. Artillery: Lt Francis W. Seeley
	Cavalry Col William W. Averell	3rd Pennsylvania Cavalry: Col William W. Averell

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: Ltc Louis Thourot 62nd New York: Col David J. Nevin 93rd Pennsylvania: Cpt John S. Long 98th Pennsylvania: Col John F. Ballier 102nd Pennsylvania: Col Thomas Algeo Rowley
	2nd Brigade BG John J. Abercrombie	65th New York: Ltc Alexander Shaler 67th New York: Ltc Nelson Cross 23rd Pennsylvania: Col Thomas H. Neill (w - Malvern Hill) 31st Pennsylvania: Col David H. Williams 61st Pennsylvania: Ltc Frank Vallee
	3rd Brigade BG Innis N. Palmer	7th Massachusetts: Col David A. Russell 10th Massachusetts: Maj Ozro Miller (mw - Malvern Hill); Cpt Frederick Barton 36th New York: Maj James A. Raney 2nd Rhode Island: Col Frank Wheaton
	Artillery	Battery C, 1st Pennsylvania Light Artillery: Cpt Jeremiah McCarthy Battery D, 1st Pennsylvania Light Artillery: Cpt Edward H. Flood
Second Division BG John J. Peck	1st Brigade BG Henry M. Naglee	11th Maine: Col Harris M. Plaisted 56th New York: Col Charles H. Van Wyck 100th New York: Ltc Phineas Staunton 52nd Pennsylvania: Ltc Henry M. Hoyt 104th Pennsylvania: Ltc John W. Nields
	2nd Brigade BG Henry W. Wessells	81st New York: Col Edwin Rose 85th New York: Col Jonathan S. Belknap 92nd New York: Ltc Hiram Anderson, Jr. 96th New York: Col James Fairman 98th New York: Ltc Charles Durkee 85th Pennsylvania: Col Joshua B. Howell 101st Pennsylvania: Cpt Charles W. May 103rd Pennsylvania: Col Theodore F. Lehmann
	Artillery	Battery H, 1st New York Light Artillery: Lt Charles E. Mink 7th New York Artillery: Cpt Peter C. Regan
	Artillery Reserve Maj Robert M. West	8th New York Light Artillery: Cpt Butler Fitch Battery E, 1st Pennsylvania Artillery: Cpt Theodore Miller Battery H, 1st Pennsylvania Artillery: Cpt James Brady Battery M, 5th U.S. Artillery: Cpt James McKnight
	Cavalry Col David M. Gregg	8th Pennsylvania Cavalry: Col David M. Gregg

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: Col Charles W. Roberts 18th Massachusetts:[8] Col James Barnes 22nd Massachusetts: Col Jesse A. Gove (k - Gaines' Mill), Maj William S. Tilton (w&c - Gaines' Mill), Cpt Walter S. Sampson, Cpt D. K. Wardwell 1st Michigan: Col Horace S. Roberts 13th New York: Col Elisha G. Marshall, Maj Francis A. Schoeffel 25th New York: Maj Edwin S. Gilbert (c), Cpt Shepard Gleason 2nd Company, Massachusetts Sharpshooters: Lt Charles D. Stiles
	2nd Brigade BG Charles Griffin	9th Massachusetts: Col Thomas Cass (mw - Malvern Hill); Ltc Patrick R. Guiney 4th Michigan: Col Dwight A. Woodbury (k - Malvern Hill), Ltc Jonathan W. Childs (w), Cpt John M. Randolph 14th New York: Col James McQuade 62nd Pennsylvania: Col Samuel W. Black (k - Gaines' Mill); Ltc Jacob B. Sweitzer (w&c - Gaines' Mill), Cpt James Hull
	3rd Brigade BG Daniel Butterfield	12th New York: Ltc Robert M. Richardson 17th New York:[8] Col Henry S. Lansing 44th New York: Ltc James C. Rice 16th Michigan: Col T. B. W. Stockton (c - Gaines' Mill), Ltc John V. Ruele 83rd Pennsylvania: Col John W. McLane (k), Cpt Hugh S. Campbell (w) Brady's Company Michigan Sharpshooters:[9] Cpt Kin S. Dygert
	Artillery Cpt William B. Weeden	3rd Massachusetts Light Artillery: Cpt Augustus Pearl Martin 5th Massachusetts Light Artillery: Lt John B. Hyde 1st Rhode Island Light, Battery C: Lt Richard Waterman Battery D, 5th U.S. Artillery: Lt Henry W. Kingsbury
	Sharpshooters Col Hiram Berdan	1st U.S. Sharpshooter Regiment: Col Hiram Berdan
Second Division BG George Sykes	1st Brigade Ltc Robert C. Buchanan	3rd United States: Maj Nathan B. Rossell (k - Gaines' Mill), Cpt Thomas W. Walker, Cpt John D. Wilkins 4th United States: Maj Delozier Davidson (c), Cpt Joseph B. Collins 12th United States: Maj Henry B. Clitz (w&c - Gaines' Mill); Cpt John G. Read, Cpt Matthew M. Blunt 14th United States: Cpt John D. O'Connell
	2nd Brigade Ltc William Chapman Maj Charles S. Lovell	2nd United States: Cpt Adolphus F. Bond, Lt John S. Poland 6th United States: Cpt Thomas Hendrickson 10th United States: Maj Charles S. Lovell; Maj George L. Andrews 11th United States: Maj De Lancey Floyd-Jones 17th United States: Maj George L. Andrews
	3rd Brigade Col Gouverneur K. Warren (w - Gaines' Mill)	5th New York: Ltc Hiram Duryee 10th New York: Col John E. Bendix
	Artillery Cpt Stephen H. Weed	Battery L and M, 3rd U.S. Artillery: Cpt John Edwards Battery I, 5th U.S. Artillery: Cpt Stephen H. Weed
Third Division (Pennsylvania Reserves) BG George A. McCall (c - Frayser's Farm) BG Truman Seymour	1st Brigade BG John F. Reynolds (c - Gaines' Mill) Col Seneca G. Simmons (k - Glendale)[10] Col Richard Biddle Roberts	1st Pennsylvania Reserves: Col Richard Biddle Roberts, Maj Lemuel Todd 2nd Pennsylvania Reserves: Ltc William McCandless 5th Pennsylvania Reserves: Col Seneca G. Simmons; Ltc Joseph W. Fisher 8th Pennsylvania Reserves: Col George S. Hays 13th Pennsylvania Reserves (Companies A, B, D, E, F, & K): Maj Roy Stone
	2nd Brigade BG George G. Meade (w - Glendale) Col Albert L. Magilton	3rd Pennsylvania Reserves: Col Horatio G. Sickel 4th Pennsylvania Reserves: Col Albert L. Magilton 7th Pennsylvania Reserves: Col Elisha B. Harvey 11th Pennsylvania Reserves: Col Thomas F. Gallagher (c - Gaines' Mill), Cpt Daniel S. Porter
	3rd Brigade BG Truman Seymour Col Conrad Feger Jackson	6th Pennsylvania Reserves:[11] -- 9th Pennsylvania Reserves: Col Conrad Feger Jackson, Cpt John Cuthbertson (w) 10th Pennsylvania Reserves: Col James T. Kirk 12th Pennsylvania Reserves: Col John H. Taggart
	Artillery Cpt Henry V. De Hart (mw - Gaines' Mill)	Battery A, 1st Pennsylvania Artillery: Cpt Hezekiah Easton (k - Gaines' Mill), Lt Jacob L. Detrich, Lt John G. Simpson Battery B, 1st Pennsylvania Artillery: Cpt James H. Cooper Battery G, 1st Pennsylvania Artillery: Cpt Mark Kerns (w), Lt Frank P. Amsden Battery C, 5th U.S. Artillery: Cpt Henry V. De Hart (mw), Lt Eben G. Scott
	Cavalry Col James H. Childs	4th Pennsylvania Cavalry: Col James H. Childs
	Cavalry Col John F. Farnsworth	8th Illinois Cavalry: Col John F. Farnsworth

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: Ltc Robert McAllister, Col A. T. A. Torbert 2nd New Jersey: Col Isaac M. Tucker (k - Gaines' Mill), Maj Henry O. Ryerson (w - Gaines' Mill), Ltc Samuel L. Buck 3rd New Jersey: Col Henry W. Brown 4th New Jersey: Col James H. Simpson (c - Gaines' Mill), Ltc William B. Hatch
	2nd Brigade Col Joseph J. Bartlett	5th Maine: Col Nathaniel J. Jackson (w - Gaines' Mill), Ltc William S. Heath (k - Gaines' Mill), Cpt Clark S. Edwards 16th New York: Col Joseph Howland (w - Gaines' Mill), Maj Joel J. Seaver 27th New York: Ltc Alexander D. Adams 96th Pennsylvania: Col Henry L. Cake
	3rd Brigade BG John Newton	18th New York: Ltc George R. Myers, Maj John C. Meginnis 31st New York: Col Calvin E. Pratt (w - Gaines' Mill), Maj Alexander Raszewski 32nd New York: Col Roderick Matheson 95th Pennsylvania: Col John M. Gosline (mw - Gaines' Mill), Ltc Gustavus W. Town
	Artillery	1st Massachusetts Light Artillery: Cpt Josiah Porter Battery A, 1st New Jersey Light Artillery: Cpt William Hexamer Battery D, 2nd U.S. Artillery: Lt Emory Upton
Second Division BG William F. Smith	1st Brigade BG Winfield S. Hancock	6th Maine: Col Hiram Burnham 43rd New York: Col Francis L. Vinton 49th Pennsylvania: Col William H. Irwin 5th Wisconsin: Col Amasa Cobb
	2nd Brigade BG William T. H. Brooks (w - Savage's Station)	2nd Vermont: Col Henry Whiting 3rd Vermont: Ltc Wheelook G. Veazey 4th Vermont: Col Edwin H. Stoughton 5th Vermont: Ltc Lewis A. Grant 6th Vermont: Col Nathan Lord, Jr.
	3rd Brigade BG John W. Davidson	7th Maine: Col Edwin C. Mason 20th New York: Col Francis Weiss 33rd New York: Col Robert F. Taylor 49th New York: Col Daniel D. Bidwell 77th New York: Col James B. McKean
	Artillery Cpt Romeyn B. Ayres	Battery E, 1st New York Light Artillery: Cpt Charles C. Wheeler 1st New York Light Artillery: Cpt Andrew Cowan 3rd New York Light Artillery: Cpt Thaddeus P. Mott Battery F, 5th U.S. Artillery: Cpt Romeyn B. Ayres
	Cavalry	5th Pennsylvania Cavalry (Companies I & K): Cpt John O'Farrell
	Cavalry	1st New York Cavalry: Col Andrew T. McReynolds

Artillery Reserve

Col Henry J. Hunt

Brigade	Batteries
First Brigade (Horse Artillery) Ltc William Hays	Battery A, 2nd U.S. Artillery: Cpt John C. Tidball Battery B and L, 2nd U.S. Artillery: Cpt James M. Robertson Battery M, 2nd U.S. Artillery: Cpt Henry Benson Battery C and G, 3rd U.S. Artillery:[11] Cpt Horatio G. Gibson
Second Brigade Ltc George W. Getty	Battery E and G, 1st U.S. Artillery: Lt Alanson Merwin Randol Battery K, 1st U.S. Artillery: Lt Samuel S. Elder Battery G, 4th U.S. Artillery: Lt Charles M. Morgan Battery A, 5th U.S. Artillery: Lt Adelbert Ames Battery K, 5th U.S. Artillery: Cpt John R. Smead
Third Brigade Maj Albert Arndt	Battery A, 1st Battalion, New York Volunteer Light Artillery: Cpt Otto Diederichs Battery B, 1st Battalion, New York Volunteer Light Artillery: Cpt Adolph Voegelee Battery C, 1st Battalion, New York Volunteer Light Artillery: Cpt Robert Langner Battery D, 1st Battalion, New York Volunteer Light Artillery: Cpt John Knieriem
Fourth Brigade Maj Edward R. Petherbridge	Battery A, Maryland Light Artillery: Cpt John W. Wolcott Battery B, Maryland Light Artillery: Cpt Alonzo Snow
Fifth Brigade Cpt J. Howard Carlisle	Battery E, 2nd U.S. Artillery: Cpt J. Howard Carlisle Battery F and K, 3rd U.S. Artillery: Cpt La Rhett L. Livingston
Unattached	Battery G, 1st New York Light Artillery:[12] Cpt John D. Frank New York Light, 5th Battery:[13] Cpt Elijah D. Taft
Siege Train Col Robert O. Tyler	1st Connecticut Heavy Artillery: Col Robert O. Tyler

Cavalry Reserve

Division	Brigade	Regiments and Others
Cavalry Reserve BG Philip St. George Cooke
	First Brigade Col Richard H. Rush	6th Pennsylvania Cavalry: Col Richard H. Rush 5th United States Cavalry (Companies A, D, H, & L): Cpt Charles J. Whiting (w&c), Cpt Joseph H. McArthur
	Second Brigade Col George A. H. Blake (w - Gaines' Mill)	1st United States Cavalry (Companies A, C, F, & H): Ltc William N. Grier 6th United States Cavalry:[8] Cpt August Kautz

Casey's Command

Brigade	Regiments and Others
Casey's Command (at White House Landing) BG Silas Casey (w)	11th Pennsylvania Cavalry (Companies B, D, F, I, & K): Col Josiah Harlan Battery F, 1st New York Light Artillery: Cpt William R. Wilson 93rd New York (Companies B, C, D, E, G, & L): Col Thomas F. Morris

Notes

Official Records, Series I, Volume XI, Part 2, pages 21-37
Official Records, Series I, Volume XI, Part 2, pages 4-12
Multiple commander names indicate command succession of command during the battle or the campaign.
Meagher was arrested on the evening June 29 and released on June 30 at 8 o'clock. Nugent commanded the Brigade at Savage's Station and the march through White Oak Swamp.
Attached to the 15th Massachusetts.
Attached to the 1st Minnesota.
See Artillery Reserve.
Detached with Stoneman's Command.
Attached to the 16th Michigan.
Killed in action at the Battle of Glendale
Detached with Casey's Command.
Temporarily assigned July 1 from Second Corps.
Not mounted, officers an men served with other batteries.

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.

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[1] Official Records, Series I, Volume XI, Part 2, pages 21-37

[2] Official Records, Series I, Volume XI, Part 2, pages 4-12

[3] Multiple commander names indicate command succession of command during the battle or the campaign.

[4] Meagher was arrested on the evening June 29 and released on June 30 at 8 o'clock. Nugent commanded the Brigade at Savage's Station and the march through White Oak Swamp.

[5] Attached to the 15th Massachusetts.

[6] Attached to the 1st Minnesota.

[7] See Artillery Reserve.

[Stoneman-8] Detached with Stoneman's Command.

[9] Attached to the 16th Michigan.

[10] Killed in action at the Battle of Glendale

[Casey-11] Detached with Casey's Command.

[12] Temporarily assigned July 1 from Second Corps.

[13] Not mounted, officers an men served with other batteries.