Second Battle of Bull Run order of battle: Union

The following Union Army units and commanders fought in the Second Battle of Bull Run, also known as the Second Battle of Manassas, of the American Civil War. The Confederate order of battle is listed separately. Order of battle compiled from the army organization^[1] during the battle,^[2] the casualty returns^[3] and the reports.^[4]

Abbreviations used

Military rank

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

Other

Union forces

Army of Virginia

MG John Pope^[5]

Chief of Staff: Col George D. Ruggles
Chief of Artillery: Cpt Alexander Piper
Chief of Cavalry: BG Washington L. Elliott (w)

Headquarters Escort:

1st Ohio Cavalry, Companies A and C

I Corps

MG Franz Sigel (w)

Chief of Artillery: Cpt Ulric Dahlgren

Headquarters Escort:

1st Indiana Cavalry, Companies I and K

Division	Brigade	Regiments and Others
First Division BG Robert C. Schenck (w) BG Julius Stahel	1st Brigade BG Julius Stahel Col Adolphus Buschbeck	8th New York: Ltc Carl B. Hedterich 41st New York: Ltc Ernest W. Holmstedt 45th New York: Ltc Edward W. Wratislaw 27th Pennsylvania: Col Adolphus Buschbeck, Ltc Lorenz Cantador New York Light Artillery, 2nd Battery: Lt F. J. T. Blume
First Division BG Robert C. Schenck (w) BG Julius Stahel	2nd Brigade Col Nathaniel C. McLean	25th Ohio: Col William P. Richardson 55th Ohio: Col John C. Lee 73rd Ohio: Col Orland Smith 75th Ohio: Maj Robert Reily 1st Ohio Light Artillery, Battery K: Lt George B. Haskin
Second Division BG Adolph von Steinwehr	1st Brigade^[6] Col John A. Koltes (k) Ltc Gustavus A. Muhleck	29th New York: Col Clemens Soest (w), Maj Louis Hartman 68th New York: Ltc John H. Kleefisch (mw) 73rd Pennsylvania: Ltc Gustavus A. Muhleck, Cpt Augustus Brueckner (k), Cpt Charles C. Cresson (w), Cpt Lewis Talter (w)
Third Division BG Carl Schurz	1st Brigade Col Alexander Schimmelfennig	61st Ohio: Ltc Stephen J. McGroarty 74th Pennsylvania: Maj Franz Blessing 8th West Virginia: Cpt Hedgman Slack Pennsylvania Light Artillery, Battery F: Cpt Robert B. Hampton
	2nd Brigade Col Wlodzimierz Krzyzanowski	54th New York: Ltc Charles Ashby 58th New York: Maj William Henkel (w), Cpt Frederick Braun 75th Pennsylvania: Ltc Francis Mahler 2nd New York Artillery, Battery L: Cpt Jacob Roemer
	Unattached	3rd West Virginia Cavalry, Company C: Cpt Jonathan Stahl 1st Ohio Light Artillery, Battery I: Cpt Hubert Dilger
Reporting directly	Independent Brigade BG Robert H. Milroy	82nd Ohio: Col James Cantwell (k), Ltc James S. Robinson 2nd West Virginia: Col George R. Latham 3rd West Virginia: Col David T. Hewes 5th West Virginia: Col John L. Zeigler 1st West Virginia Cavalry, Companies C, E, and L: Maj John S. Krepps Ohio Light Artillery, 12th Battery: Cpt Aaron C. Johnson
	Cavalry Brigade Col John Beardsley^[7]	1st Connecticut Battalion 1st Maryland: Ltc Charles Wetschky 4th New York: Ltc Ferris Nazer 9th New York: Maj Charles McL. Knox 6th Ohio: Col William R. Lloyd
	Reserve Artillery^[8] Cpt Louis Schirmer	1st New York Light, Battery I: Cpt Michael Wiedrich New York Light, 13th Battery: Cpt Julius Dieckmann West Virginia Light, Battery C: Lt Wallace Hill

II Corps

Brigade	Regiments and Others
Cavalry Brigade^[9] BG John Buford^[10] (w)	1st Michigan: Col Thornton F. Brodhead (mw), Maj Charles H. Town 5th New York: Col Othniel DeForest 1st Vermont: Col Charles H. Tompkins 1st West Virginia: Ltc Nathaniel P. Richmond
Artillery^[9]	Maine Light, 6th Battery:^[11] Cpt Freeman McGilvery

III Corps

MG Irvin McDowell

Chief of Staff: Col Edmund Schriver
Chief of Artillery: Maj Davis Tillson

Headquarters Troops:

Maine Light Artillery, 3rd Battery (Pontonniers): Cpt James G. Swett
13th Pennsylvania Reserves (1st Rifles), Companies C, G, H and I: Ltc Thomas L. Kane

Division	Brigade	Regiments and Others
First Division BG Rufus King^[12] BG John P. Hatch (w) BG Abner Doubleday	1st Brigade BG John P. Hatch Col Timothy Sullivan	22nd New York: Col Walter Phelps, Jr. 24th New York: Col Timothy Sullivan, Ltc Samuel Beardsley (w), Maj Andrew Barney (w) 30th New York: Col Edward Frisby (k) 84th New York (14th Militia): Ltc Edward B. Fowler (w), Maj William H. DeBevoise 2nd United States Sharpshooters: Col Henry A. V. Post
	2nd Brigade BG Abner Doubleday Col William P. Wainwright	76th New York: Col William P. Wainwright, Maj Charles E. Livingstone 95th New York: Ltc James B. Post 56th Pennsylvania: Col Sullivan A. Meredith (w), Ltc J. William Hofmann
	3rd Brigade BG Marsena R. Patrick	21st New York: Col William F. Rogers 23rd New York: Ltc Nirom M. Crane 35th New York: Col Newton B. Lord 80th New York (20th Militia): Col George W. Pratt (mw), Ltc Theodore B. Gates
	4th Brigade BG John Gibbon	19th Indiana: Col Solomon Meredith 2nd Wisconsin: Col Edgar O'Conner (k), Ltc Lucius Fairchild^[13] 6th Wisconsin: Col Lysander Cutler (w), Ltc Edward S. Bragg 7th Wisconsin: Col William W. Robinson (w), Ltc Charles A. Hamilton (w), Ltc Lucius Fairchild^[13]
	Artillery	New Hampshire Light, 1st Battery: Cpt George A. Gerrish (c), Lt Frederick M. Edgell 1st New York Light, Battery L: Cpt John A. Reynolds 1st Rhode Island Light, Battery D: Cpt J. Albert Monroe 4th United States, Battery B: Cpt Joseph B. Campbell
Second Division BG James B. Ricketts	1st Brigade BG Abram Duryée	97th New York: Ltc John P. Spofford 104th New York: Maj Lewis C. Skinner 105th New York: Col Howard Carroll 107th Pennsylvania: Col Thomas F. McCoy
	2nd Brigade BG Zealous B. Tower (w) Col William H. Christian	26th New York: Col William H. Christian, Ltc Richard H. Richardson 94th New York: Col Adrian R. Root (w) 88th Pennsylvania: Ltc Joseph A. McLean (k), Maj George W. Gile 90th Pennsylvania: Col Peter Lyle
	3rd Brigade Col John W. Stiles	12th Massachusetts: Col Fletcher Webster (k), Ltc Timothy M. Bryan, Jr. 13th Massachusetts: Col Samuel H. Leonard 83rd New York (9th Militia): Ltc William Atterbury 11th Pennsylvania: Col Richard Coulter
	4th Brigade Col Joseph Thoburn (w)	7th Indiana: Lieutenant Col John F. Cheek 84th Pennsylvania: Col Samuel M. Bowman 110th Pennsylvania: Col William D. Lewis, Jr. 1st West Virginia: Ltc Henry B. Hubbard
	Artillery	Maine Light, 2nd Battery: Cpt James A. Hall Maine Light, 5th Battery: Cpt George F. Leppien 1st Pennsylvania Light, Battery F: Cpt Ezra W. Matthews Pennsylvania Light, Battery C: Cpt James Thompson
Pennsylvania Reserves^[14] BG John F. Reynolds	1st Brigade BG George G. Meade	3rd Pennsylvania Reserves: Col Horatio G. Sickel 4th Pennsylvania Reserves: Col Albert L. Magilton 7th Pennsylvania Reserves: Ltc Robert M. Henderson (w) 8th Pennsylvania Reserves: Cpt William Lemon 13th Pennsylvania Reserves (1st Rifles), Companies A, B, D, E, F and K: Col Hugh W. McNeil
	2nd Brigade BG Truman Seymour	1st Pennsylvania Reserves: Col Richard Biddle Roberts 2nd Pennsylvania Reserves: Col William McCandless (w) 5th Pennsylvania Reserves: Ltc George Dare 6th Pennsylvania Reserves: Col William Sinclair
	3rd Brigade BG Conrad F. Jackson^[15] Col Martin Davis Hardin (w) Col James T. Kirk (w) Ltc Robert Anderson	9th Pennsylvania Reserves: Ltc Robert Anderson, Maj James M. Snodgrass 10th Pennsylvania Reserves: Col James T. Kirk 11th Pennsylvania Reserves: Ltc Samuel M. Jackson 12th Pennsylvania Reserves: Col Martin D. Hardin, Cpt Richard Gustin
	Artillery Cpt Dunbar R. Ransom	1st Pennsylvania Light, Battery A: Lt John G. Simpson 1st Pennsylvania Light, Battery B: Cpt James H. Cooper 1st Pennsylvania Light, Battery G: Cpt Mark Kern 5th United States, Battery C: Cpt Dunbar R. Ransom
Reporting directly	Cavalry Brigade BG George D. Bayard	1st Maine: Col Samuel H. Allen 2nd New York: Col J. Mansfield Davies 1st New Jersey: Ltc Joseph Karge (w), Maj Ivins D. Jones 1st Pennsylvania: Col Owen Jones 1st Rhode Island: Col Alfred N. Duffié
Reporting directly	Unattached	3rd Indiana Cavalry (detachment) Indiana Light Artillery, 16th Battery: Cpt Charles A. Naylor 4th United States, Battery E: Cpt Joseph C. Clark, Jr.

Reserve Corps

BG Samuel D. Sturgis

Brigade	Regiments and Others
Piatt's Brigade^[16] BG Abram S. Piatt	63rd Indiana (Companies A, B, C and D): Ltc John S. Williams 86th New York: Col Benajah P. Bailey

Army of the Potomac

The following Corps from the Army of the Potomac were attached to the Army of Virginia.

III Corps

MG Samuel P. Heintzelman

Division	Brigade	Regiments and Others
First Division MG Philip Kearny	1st Brigade BG John C. Robinson	20th Indiana: Col William L. Brown (k), Maj John Wheeler 30th Ohio Infantry (6 cos.), Lt. Col. Theodore Jones 63rd Pennsylvania: Col Alexander Hays (w), Cpt James F. Ryan (w) 105th Pennsylvania: Ltc Calvin A. Craig (w), Maj Jacob W. Greenwalt
	2nd Brigade BG David B. Birney	3rd Maine: Cpt Moses B. Lakeman, Maj Edwin Burt^[17] 4th Maine: Col Elijah Walker 1st New York: Maj Edwin Burt,^[17] Cpt Joseph Yeamans 38th New York: Col J. H. Hobart Ward 40th New York: Col Thomas W. Egan 101st New York: Ltc Nelson A. Gesner 57th Pennsylvania: Maj William Birney
	3rd Brigade Col Orlando Poe	2nd Michigan: Ltc Louis Dillman 3rd Michigan: Col Stephen G. Champlin (w), Maj Byron R. Pierce 5th Michigan: Cpt William Wakenshaw 37th New York: Col Samuel B. Hayman 99th Pennsylvania: Col Asher S. Leidy
	Artillery	1st Rhode Island Light, Battery E: Cpt George E. Randolph 1st United States, Battery K: Cpt William M. Graham
Second Division MG Joseph Hooker	1st Brigade BG Cuvier Grover	1st Massachusetts: Col Robert Cowdin 11th Massachusetts: Col William E. Blaisdell 16th Massachusetts: Maj Gardner Banks 2nd New Hampshire: Col Gilman Marston 26th Pennsylvania: Maj Robert L. Bodine
	2nd Brigade Col Nelson Taylor	70th New York: Cpt Charles L. Young 71st New York: Cpt Owen Murphy 72nd New York: Cpt Harman J. Bliss 73rd New York: Cpt M. William Burns 74th New York: Maj Edward L. Price
	3rd Brigade Col Joseph B. Carr	5th New Jersey: Ltc William J. Sewell 6th New Jersey: Col Gershom Mott (w), Ltc George C. Burling 7th New Jersey: Col Joseph W. Revere 8th New Jersey: Ltc William Ward (w), Cpt John Tuite (k), Cpt George Hoffman,^[18] Cpt Oliver S. Johnson, Cpt Daniel Blauvelt, Jr.^[19] 2nd New York: Cpt Sidney W. Park 115th Pennsylvania: Ltc Robert Thompson

V Corps

MG Fitz John Porter

Chief of Staff: Ltc Frederick T. Locke

Division	Brigade	Regiments and Others
First Division BG Daniel Butterfield^[20]	1st Brigade^[21] Col Charles W. Roberts	2nd Maine: Maj Daniel F. Sargent 18th Massachusetts: Maj Joseph Hayes 1st Michigan: Col Horace S. Roberts (k), Cpt Emery W. Belton 13th New York: Col Elisha G. Marshall 25th New York: Col Charles A. Johnson
	3rd Brigade Col Henry S. Lansing^[22] Col Henry A. Weeks (w) Col James C. Rice	16th Michigan:^[23] Cpt Thomas J. Barry (w), Cpt Henry H. Sibley 12th New York: Col Henry A. Weeks, Cpt Adrian I. Root (w), Cpt William Huson 17th New York: Col Henry S. Lansing, Maj William T. C. Grower (w), Cpt John Vickers 44th New York: Col James C. Rice, Maj Freeman Conner 83rd Pennsylvania: Ltc Hugh S. Campbell (w), Maj William R. Lamont (w), Cpt John Graham (w), Cpt Orpheus S. Woodward
	Sharpshooters	1st United States: Col Hiram Berdan
	Artillery^[24]	1st Rhode Island Light, Battery C: Cpt Richard Waterman 5th United States, Battery D: Lt Charles E. Hazlett
Second Division BG George Sykes	1st Brigade Ltc Robert C. Buchanan	3rd United States: Cpt John D. Wilkins 4th United States: Cpt Joseph B. Collins (w), Cpt Hiram Dryer 12th United States, 1st Battalion: Cpt Matthew M. Blunt 14th United States, 1st Battalion: Cpt John D. O'Connell (w), Cpt W. Harvey Brown 14th United States, 2nd Battalion: Cpt David B. McKibbin (w)
	2nd Brigade Ltc William Chapman	1st and 6th United States:^[25] Cpt Levi C. Bootes 2nd and 10th United States:^[26] Maj Charles S. Lovell 11th United States: Maj Delancey Floyd-Jones 17th United States: Maj George L. Andrews
	3rd Brigade Col Gouverneur K. Warren	5th New York: Cpt Cleveland Winslow 10th New York: Col John E. Bendix
	Artillery Cpt Stephen H. Weed	1st United States, Batteries E and G: Lt Alanson M. Randol 5th United States, Battery I: Cpt Stephen H. Weed 5th United States, Battery K: Cpt John R. Smead (k), Lt William E. Van Reed

IX Corps

MG Jesse L. Reno

Division	Brigade	Regiments and Others
First Division BG Isaac I. Stevens	1st Brigade Col Benjamin C. Christ	8th Michigan: Ltc Frank Graves 50th Pennsylvania: Ltc Thomas S. Brenholtz (w), Maj Edward Overton, Jr.
	2nd Brigade Col Daniel Leasure (w) Ltc David A. Leckey	46th New York (5 companies): Col Rudolph Rosa (w), Maj Julius Parcus 100th Pennsylvania: Ltc David A. Leckey (w), Cpt James E. Cornelius
	3rd Brigade Col Addison Farnsworth	28th Massachusetts: Maj George W. Cartwright (w), Cpt Andrew P. Caraher 79th New York: Ltc David Morrison
	Artillery	Massachusetts Light, 8th Battery: Cpt Asa M. Cook 2nd U.S. Artillery, Battery E: Lt Samuel N. Benjamin
Second Division MG Jesse L. Reno^[27]	1st Brigade Col James Nagle	2nd Maryland: Ltc J. Eugene Duryèe 6th New Hampshire: Col Simon G. Griffin 48th Pennsylvania: Ltc Joshua K. Sigfried
	2nd Brigade Col Edward Ferrero	21st Massachusetts: Col William S. Clark 51st New York: Ltc Robert Brown Potter 51st Pennsylvania: Col John F. Hartranft
	Artillery	Pennsylvania Light, Battery D: Cpt George W. Durell

Notes

^ Multiple commander names indicate command succession of command during the battle or the campaign.
^ Battles and Leaders of the Civil War, Volume 2, pages 497-499; Official Records, Series I, Volume XII, Part 3, pages 581-588; Manassas National Battlefield Park - Battle of Second Manassas, Union Order of Battle
^ Official Records, Series I, Volume XII, Part 2, pages 249-262
^ Official Records, Series I, Volume XII, Part 2, pages 829-830, 872-874; Official Records, Series I, Volume LI, Part 1, pages 1326, 1404
^ Also commanded the detachments from the Army of the Potomac (see: Pope's report)
^ Temporarily attached to Third Division August 30, 1862
^ Beardsley's brigade was unusable on August 29-30 due to the poor condition of its horses.
^ Captain Frank Buell was killed on August 22, 1862 (see: Official Records, Series I, Volume XII, Part 2, page 820)
^ ^a ^b No troops from the Second Corps, Army of Virginia, excepting its cavalry and the 6th Maine Battery, were engaged in any of the principal battles. During the battle the Corps was located at Bristoe Station (see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 411).
^ For Buford's wound see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 434
^ Temporarily attached to the Third Corps, Army of the Potomac, August 28–30, 1862 (see: Itinerary of the 6th Maine Battery)
^ Sick after August 28, 1862
^ ^a ^b Commanded the 2nd and 7th Wisconsin on August 30, 1862 (see: Gibbon's report)
^ Temporarily attached to the Third Corps, Army of Virginia
^ Turned over command to Colonel Hardin on account of sickness on August 29, 1862 (see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 375; Reynolds' report)
^ Temporarily attached to the Fifth Corps, Army of the Potomac August 27–31, 1862
^ ^a ^b Commanded 1st New York on August 29, 1862, returned to the 3rd Maine on August 30, 1862 (see: Lakeman's and Burt's report)
^ Injured August 29, 1862 and turned the command over to Captain Johnson (see: Hoffman's report)
^ Rejoined the regiment on August 30, 1862 and assumed command as the senior officer present (see: Hoffman's report)
^ Commanded the First and Third Brigades in battle August 30, 1862. The division commander Major General Morell and the Second Brigade (9th Massachusetts, 32nd Massachusetts, 4th Michigan, 14th New York and 62nd Pennsylvania) under Brigadier General Griffin were at Centreville, Virginia. (see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 318; Lansing's report)
^ 22nd Massachusetts detached at Centreville, Virginia (see: Roberts' report)
^ Turned over command to Colonel Weeks on account of sickness on August 30, 1862 (see: Lansing's report)
^ Brady's Company Michigan Sharpshooters attached
^ 3rd Massachusetts Battery detached at Centreville, Virginia (see: Martin's report)
^ Only Company G, 1st United States under Captain Matthew R. Marston was present and attached to the 6th United States (see: Bootes' report)
^ The 2nd and 10th United States were consolidated under the command of Major Lovell (see: Chapman's and Lovell's report)
^ Also in command of all the troops of the Ninth Corps with Pope's army.

References

Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War, Volume 2 (Pdf), New York: The Century Co., 1887.
Hennessy, John J., Return to Bull Run: The Campaign and Battle of Second Manassas. University of Oklahoma Press, Norman, 1993. ISBN 978-0-8061-3187-0
Manassas National Battlefield Park - Battle of Second Manassas
The Armies at the Second Battle of Bull Run
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.

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

[2] Battles and Leaders of the Civil War, Volume 2, pages 497-499; Official Records, Series I, Volume XII, Part 3, pages 581-588; Manassas National Battlefield Park - Battle of Second Manassas, Union Order of Battle

[3] Official Records, Series I, Volume XII, Part 2, pages 249-262

[4] Official Records, Series I, Volume XII, Part 2, pages 829-830, 872-874; Official Records, Series I, Volume LI, Part 1, pages 1326, 1404

[5] Also commanded the detachments from the Army of the Potomac (see: Pope's report)

[6] Temporarily attached to Third Division August 30, 1862

[7] Beardsley's brigade was unusable on August 29-30 due to the poor condition of its horses.

[8] Captain Frank Buell was killed on August 22, 1862 (see: Official Records, Series I, Volume XII, Part 2, page 820)

[IICorps-9] No troops from the Second Corps, Army of Virginia, excepting its cavalry and the 6th Maine Battery, were engaged in any of the principal battles. During the battle the Corps was located at Bristoe Station (see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 411).

[10] For Buford's wound see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 434

[11] Temporarily attached to the Third Corps, Army of the Potomac, August 28–30, 1862 (see: Itinerary of the 6th Maine Battery)

[12] Sick after August 28, 1862

[Fairchild-13] Commanded the 2nd and 7th Wisconsin on August 30, 1862 (see: Gibbon's report)

[14] Temporarily attached to the Third Corps, Army of Virginia

[15] Turned over command to Colonel Hardin on account of sickness on August 29, 1862 (see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 375; Reynolds' report)

[16] Temporarily attached to the Fifth Corps, Army of the Potomac August 27–31, 1862

[Burt-17] Commanded 1st New York on August 29, 1862, returned to the 3rd Maine on August 30, 1862 (see: Lakeman's and Burt's report)

[18] Injured August 29, 1862 and turned the command over to Captain Johnson (see: Hoffman's report)

[19] Rejoined the regiment on August 30, 1862 and assumed command as the senior officer present (see: Hoffman's report)

[20] Commanded the First and Third Brigades in battle August 30, 1862. The division commander Major General Morell and the Second Brigade (9th Massachusetts, 32nd Massachusetts, 4th Michigan, 14th New York and 62nd Pennsylvania) under Brigadier General Griffin were at Centreville, Virginia. (see: John J. Hennessy, Return to Bull Run, The Campaign and Battle of Second Manassas, page 318; Lansing's report)

[21] 22nd Massachusetts detached at Centreville, Virginia (see: Roberts' report)

[22] Turned over command to Colonel Weeks on account of sickness on August 30, 1862 (see: Lansing's report)

[23] Brady's Company Michigan Sharpshooters attached

[24] 3rd Massachusetts Battery detached at Centreville, Virginia (see: Martin's report)

[25] Only Company G, 1st United States under Captain Matthew R. Marston was present and attached to the 6th United States (see: Bootes' report)

[26] The 2nd and 10th United States were consolidated under the command of Major Lovell (see: Chapman's and Lovell's report)

[27] Also in command of all the troops of the Ninth Corps with Pope's army.

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