# Battle of Seven Pines order of battle: Union

The following Union Army units and commanders fought in the Battle of Seven Pines on May 31 and June 1, 1862. 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
* Lt = Lieutenant

### Other

* w = wounded
* mw = mortally wounded
* k = killed

## Army of the Potomac

MG George B. McClellan
Chief of Staff: Col Randolph B. Marcy
| Division | Brigade | Regiments and Others |
| General Headquarters   Maj Granville O. Haller | Headquarter & Body Guards | 4th U.S. Cavalry (2 companies) Sturgis Rifles (Illinois) Oneida (New York) Cavalry |
| General Headquarters   Maj Granville O. Haller | Provost Guards | 2nd U.S. Cavalry 8th U.S. (2 companies) |
| General Headquarters   Maj Granville O. Haller | | 93rd New York (4 companies) McClellan Dragoons (Illinois) |
| Chief of Engineers   BG John G. Barnard | Volunteer Engineer Brigade   BG Daniel P. Woodbury | 15th New York Engineers 50th New York Engineers |
| Chief of Engineers   BG John G. Barnard | | U.S. Engineer Battalion (3 companies): Cpt James C. Duane |

### II Corps

BG Edwin V. Sumner
| Division | Brigade | Regiments and Others |
| First Division   BG Israel B. Richardson | 1st Brigade   BG Oliver O. Howard (w)   Col Thomas J. Parker | 5th New Hampshire: Col Edward E. Cross (w), Ltc Samuel G. Langley 61st New York: Col Francis C. Barlow, Ltc William Massett (k) 64th New York: Ltc Daniel C. Bingham (w) 81st Pennsylvania: Col James Miller (k), Ltc Charles F. Johnson |
| First Division   BG Israel B. Richardson | 2nd Brigade   BG Thomas F. Meagher | 63rd New York: Col John Burke 69th New York: Col Robert Nugent 88th New York: Ltc Patrick Kelly |
| First Division   BG Israel B. Richardson | 3rd Brigade   BG William H. French | 52nd New York: Col Paul Frank 57th New York: Col Samuel K. Zook 66th New York: Col Joseph C. Pinckney 53rd Pennsylvania: Col John R. Brooke, Maj Thomas Yeager (k) |
| First Division   BG Israel B. Richardson | Artillery   Cpt George W. Hazzard | Battery B, 1st New York Light Artillery: Cpt Rufus D. Pettit Battery G, 1st New York Light Artillery: Cpt John D. Frank Battery A & Battery C, 4th U.S. Artillery: Cpt George W. Hazzard |
| First Division   BG Israel B. Richardson | Cavalry | 6th New York Cavalry (Co. D) |
| Second Division   BG John Sedgwick | 1st Brigade   BG Willis A. Gorman | 15th Massachusetts: Col John W. Kimball 1st Minnesota: Col Alfred Sully 34th New York: Col James A. Suiter 82nd New York: Ltc Henry W. Hudson 1st Company, Massachusetts Sharpshooters: Cpt John Saunders 2nd Company, Minnesota Sharpshooters: Cpt William F. Russell |
| Second Division   BG John Sedgwick | 2nd Brigade   BG William W. Burns | 69th Pennsylvania: Col Joshua T. Owen 71st Pennsylvania: Maj Charles W. Smith 72nd Pennsylvania: Col De Witt C. Baxter 106th Pennsylvania: Col Turner G. Morehead |
| Second Division   BG John Sedgwick | 3rd Brigade   BG Napoleon J.T. Dana | 19th Massachusetts: Col Edward W. Hinks 20th Massachusetts: Col W. Raymond Lee 7th Michigan: Col Ira R. Grosvenor, Maj John H. Richardson 42nd New York: Col Edmund C. Charles |
| Second Division   BG John Sedgwick | Artillery   Col Charles H. Tompkins | Battery A, 1st Rhode Island Light Artillery: Cpt John A. Tompkins Battery B, 1st Rhode Island Light Artillery: Cpt Walter O. Bartlett Battery G, 1st Rhode Island Light Artillery: Cpt Charles D. Owen Battery I, 1st U.S. Artillery: Lt Edmund Kirby |
| Second Division   BG John Sedgwick | Cavalry | 6th New York Cavalry (Co. K): Cpt Riley Johnston |

### III Corps

BG Samuel P. Heintzelman
| Division | Brigade | Regiments and Others |
| Second Division   BG Joseph Hooker | 1st Brigade   BG Cuvier Grover | 1st Massachusetts: Maj Charles P. Chandler 11th Massachusetts: Ltc Porter D. Tripp 2nd New Hampshire: Col Gilman Marston 26th Pennsylvania: Maj Casper M. Berry |
| Second Division   BG Joseph Hooker | 2nd Brigade   BG Daniel Sickles | 70th New York: Maj Thomas Holt 71st New York: Col George B. Hall 72nd New York: Col Nelson Taylor 73rd New York: Maj John D. Moriarty, Cpt Charles B. Elliot 74th New York: Col Charles K. Graham |
| Second Division   BG Joseph Hooker | 3rd Brigade   BG Francis E. Patterson   Col Samuel H. Starr | 5th New Jersey: Col Samuel H. Starr 6th New Jersey: Col Gershom Mott 7th New Jersey: Col Joseph W. Revere 8th New Jersey: Col Adolphus J. Johnson |
| Second Division   BG Joseph Hooker | Artillery   Maj Charles S. Wainwright | Battery D, 1st New York Light Artillery: Cpt Thomas W. Osborn 4th New York Independent Battery: Cpt James E. Smith 6th New York Independent Battery: Cpt Walter M. Bramhall Battery H, 1st U.S. Artillery: Lt Charles R. Eakin |
| Third Division   BG Philip Kearny | 1st Brigade   BG Charles D. Jameson (w) | 87th New York: Col Stephen A. Dodge (w), Ltc Richard A. Bachia 57th Pennsylvania: Col Charles T. Campbell (w), Ltc E. W. Woods, Maj Jeremiah Culp (k) 63rd Pennsylvania: Col Alexander Hays, Ltc Algernon S. M. Morgan (w) 105th Pennsylvania: Col Amor A. McKnight (w) |
| Third Division   BG Philip Kearny | 2nd Brigade   BG David B. Birney   Col J. H. Hobart Ward | 3rd Maine: Col Henry G. Staples 4th Maine: Col Elijah Walker 38th New York: Col J. H. Hobart Ward 40th New York: Col Edward J. Riley (w), Ltc Thomas W. Egan |
| Third Division   BG Philip Kearny | 3rd Brigade   BG Hiram G. Berry | 2nd Michigan: Col Orlando M. Poe, Ltc Adolphus Williams (w) 3rd Michigan: Col Stephen G. Champlin (w) 5th Michigan: Col Henry D. Terry 37th New York: Col Samuel B. Hayman |
| Third Division   BG Philip Kearny | Artillery   Cpt James Thompson | Battery B, New Jersey Light Artillery: Cpt Adoniram J. Clark Battery E, 1st Rhode Island Light Artillery: Lt John K. Bucklyn Battery G, 2nd U.S. Artillery: Lt John H. Butler |
| | Cavalry | 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 John J. Peck | 55th New York: Ltc Louis Thourot 62nd New York: Col J. Lafayette Riker (k), Ltc David J. Nevin 93rd Pennsylvania: Col J. M. McCarter (w), Cpt John E. Arthur 102nd Pennsylvania: Col Thomas A. Rowley (w), Ltc J. M. Kinkead |
| First Division   BG Darius N. Couch | 2nd Brigade   BG John J. Abercrombie | 65th New York: Col John Cochrane 67th New York: Col Julius W. Adams (w), Ltc Nelson Cross 23rd Pennsylvania: Col Thomas H. Neill, Ltc John Ely (w) 61st Pennsylvania: Col Oliver H. Rippey (k), Cpt Robert L. Orr 82d Pennsylvania: Col David H. Williams |
| First Division   BG Darius N. Couch | 3rd Brigade   BG Charles Devens (w)   Col Charles H. Innes | 7th Massachusetts: Col David A. Russell 10th Massachusetts: Col Henry S. Briggs (w), Cpt Orzo Miller 36th New York: Ltc D. E. Hungerford |
| First Division   BG Darius N. Couch | Artillery   Maj Robert M. West | Battery C, 1st Pennsylvania Light Artillery: Cpt Jeremiah McCarthy Battery D, 1st Pennsylvania Light Artillery: Cpt Edward H. Flood Battery E, 1st Pennsylvania Light Artillery: Cpt Theodore Miller Battery H, 1st Pennsylvania Light Artillery: Cpt James Brady |
| First Division   BG Darius N. Couch | Cavalry | 6th New York Cavalry (Co. F) |
| Third Division   BG Silas Casey | 1st Brigade   BG Henry M. Naglee | 11th Maine: Col Harris M. Plaisted 56th New York: Ltc James Jourdan 100th New York: Col James M. Brown (k) 52nd Pennsylvania: Col John C. Dodge Jr. 104th Pennsylvania: Col W. W. H. Davis (w), Ltc John W. Nields (w), Maj John M. Gries (mw) |
| Third Division   BG Silas Casey | 2nd Brigade   BG Henry W. Wessells | 96th New York: Col James Fairman 85th Pennsylvania: Col Joshua B. Howell 101st Pennsylvania: Ltc David B. Morris (w) 103rd Pennsylvania: Maj A. W. Gazzam |
| Third Division   BG Silas Casey | 3rd Brigade   BG Innis N. Palmer | 81st New York: Ltc Jacob J. DeForest (w), Cpt W. C. Raulston 85th New York: Col Jonathan S. Belknap 92nd New York: Col Lewis C. Hunt (w), Ltc Hiram Anderson Jr. 98th New York: Ltc Charles Durkee |
| Third Division   BG Silas Casey | Artillery   Col Guilford D. Bailey (k)   Maj D. H. Van Valkenburgh (k)   Cpt Peter C. Regan | Battery A, 1st New York Light Artillery: Lt George P. Hart Battery H, 1st New York Light Artillery: Cpt Joseph Spratt (w), Lt Charles E. Mink 7th New York Independent Battery: Cpt Peter C. Regan 8th New York Independent Battery: Cpt Butler Fitch |
| Third Division   BG Silas Casey | Cavalry | 6th New York Cavalry (Co. B): |
| | Cavalry | 8th Pennsylvania Cavalry: Col David M. Gregg |

### V Corps

BG Fitz John Porter
| Division | Brigade | Regiments and Others |
| First Division   BG George W. Morell | 1st Brigade   BG John H. Martindale | 2nd Maine 18th Massachusetts 22nd Massachusetts 13th New York 25th New York 2nd Company, Massachusetts Sharpshooters: |
| First Division   BG George W. Morell | 2nd Brigade   Col James McQuade | 9th Massachusetts 4th Michigan 14th New York 62nd Pennsylvania |
| First Division   BG George W. Morell | 3rd Brigade   BG Daniel Butterfield | 16th Michigan 12th New York 17th New York 44th New York 83rd Pennsylvania Brady's Company, Michigan Sharpshooters: |
| First Division   BG George W. Morell | Artillery   Cpt Charles Griffin | Battery C, Massachusetts Light Artillery Battery E, Massachusetts Light Artillery Battery C, 1st Rhode Island Light Artillery Battery D, 5th U.S. Artillery |
| First Division   BG George W. Morell | Sharpshooters | 1st U.S. Sharpshooters: Col Hiram Berdan |
| Second Division   BG George Sykes | 1st Brigade   Col Robert C. Buchanan | 3rd U.S. 4th U.S. 12th U.S. 14th U.S. |
| Second Division   BG George Sykes | 2nd Brigade   Ltc William Chapman | 2nd U.S. 6th U.S. 10th U.S. 11th U.S. 17th U.S. |
| Second Division   BG George Sykes | 3rd Brigade   Col Gouverneur K. Warren | 5th New York 1st Connecticut Heavy Artillery (serving as infantry) |
| Artillery Reserve   Col Henry J. Hunt | 1st Brigade   Ltc William Hays | Battery M, 2nd U.S. Artillery: Captain Henry Benson Battery C–G, 3rd U.S. Artillery |
| Artillery Reserve   Col Henry J. Hunt | 2nd Brigade   Ltc George W. Getty | Battery E, 1st U.S. Artillery: Lt Alanson Merwin Randol Battery G & K, 1st U.S. Artillery Battery G, 4th U.S. Artillery Battery A, 5th U.S. Artillery Battery K, 5th U.S. Artillery |
| Artillery Reserve   Col Henry J. Hunt | 3rd Brigade   Maj Albert Arndt | Battery A, 1st New York Artillery Battalion Battery B, 1st New York Artillery Battalion Battery C, 1st New York Artillery Battalion Battery D, 1st New York Artillery Battalion |
| Artillery Reserve   Col Henry J. Hunt | 4th Brigade   Cpt J. Howard Carlisle | Battery E, 2nd U.S. Artillery Battery F–K, 3rd U.S. Artillery Battery K, 4th U.S. Artillery |

### 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 |
| First Division   BG Henry W. Slocum | 2nd Brigade   Col Joseph J. Bartlett | 5th Maine 16th New York 27th New York 96th Pennsylvania |
| First Division   BG Henry W. Slocum | 3rd Brigade   BG John Newton | 18th New York 31st New York 32nd New York 95th Pennsylvania |
| First Division   BG Henry W. Slocum | Artillery   Cpt Edward R. Platt | Battery A, Massachusetts Light Artillery Battery A, New Jersey Light Artillery Battery D, 2nd U.S. Artillery |
| Second Division   BG William F. Smith | 1st Brigade   BG Winfield S. Hancock | 6th Maine 43rd New York 49th Pennsylvania 5th Wisconsin |
| Second Division   BG William F. Smith | 2nd Brigade   BG William T. H. Brooks | 2nd Vermont 3rd Vermont 4th Vermont 5th Vermont 6th Vermont |
| Second Division   BG William F. Smith | 3rd Brigade   BG John W. Davidson | 7th Maine 33rd New York 49th New York 77th New York |
| Second Division   BG William F. Smith | Artillery   Cpt Romeyn B. Ayres | Battery E, 1st New York Light Artillery 1st New York Independent Battery 3rd New York Independent Battery Battery F, 5th U.S. Artillery |
| Second Division   BG William F. Smith | Cavalry | 1st New York Cavalry |

### Reserves

| Division | Brigade | Regiments and Others |
| Cavalry Reserve   BG Philip St. George Cooke | 1st Brigade   BG William H. Emory | 5th U.S. Cavalry 6th U.S. Cavalry 6th Pennsylvania Cavalry |
| Cavalry Reserve   BG Philip St. George Cooke | 2nd Brigade   Col George A.H. Blake | 1st U.S. Cavalry 8th Pennsylvania Cavalry |
| | Advance Guard   BG George Stoneman | 8th Illinois Cavalry 98th Pennsylvania 2nd Rhode Island Battery A, 2nd U.S. Artillery Batteries B and L, 2nd U.S. Artillery |
| | White House Command   Ltc Rufus Ingalls | 93rd New York (6 companies) 11th Pennsylvania Cavalry (5 companies) Battery F, 1st New York Light Artillery |