Date: 14 Sep 1862 [unknown]
Location: Boonsboro, Washington County, Frederick County

Contents 1 Army of the Potomac 2 Left Wing 2.1 I Corps (Turner's Gap) 2.1.1 First Division 2.1.1.1 1st Brigade 2.1.1.2 2nd Brigade 2.1.1.3 3rd Brigade 2.1.1.4 4th Brigade 2.1.1.5 First Division Artillery 2.1.2 Second Division 2.1.2.1 1st Brigade 2.1.2.2 2nd Brigade 2.1.2.3 3rd Brigade 2.1.2.4 Second Division Artillery 2.1.3 Third Division 2.1.3.1 1st Brigade 2.1.3.2 2nd Brigade 2.1.3.3 3rd Brigade 2.1.3.4 Third Division Artillery 2.2 IX Corps (Fox's Gap) 2.2.1 Kanawha Division 2.2.1.1 1st Brigade 2.2.1.2 2nd Brigade 2.2.2 First Division 2.2.2.1 1st Brigade 2.2.2.2 2nd Brigade 2.2.3 Second Division 2.2.3.1 1st Brigade 2.2.3.2 2nd Brigade 2.2.3.3 Second Division Artillery 2.2.4 Third Division 2.2.4.1 1st Brigade 2.2.4.2 2nd Brigade 2.3 XI Corps (Crampton's Gap) 2.3.1 First Division 2.3.1.1 1st Brigade 2.3.1.2 2nd Brigade 2.3.1.3 3rd Brigade 2.3.1.4 First Division Artillery 2.3.2 Second Division 2.3.2.1 1st Brigade 2.3.2.2 2nd Brigade 2.3.2.3 3rd Brigade 2.3.2.4 Second Division Artillery

Army of the Potomac

Commanding: Major General George B. McClellan

Left Wing

Commanding: Major General Ambrose Burnside

I Corps (Turner's Gap)

Commanding: Major General Joseph Hooker

First Division

Commanding: Brigadier General John Hatch (w)

Commanding: Brigadier General Rufus King

Commanding: Brigadier General Abner Doubleday

1st Brigade

Commanding: Colonel Walter Phelps, Jr.

2nd US Sharpshooters - Colonel Henry A.V. Post

22nd New York - Lt. Colonel John McKie

24th New York - Captain John D. O'Brian

30th New York - Colonel William M. Searing

84th New York/14th Brooklyn - Major William H. DeBevoise

2nd Brigade

Commanding: Brigadier General Abner Doubleday

Commanding: Colonel William P. Wainwright (w)

Commanding: Lt. Colonel John W. Hofmann

7th Indiana - Major Ira G. Grover

56th Pennsylvania - Lt. Colonel John W. Hofmann

76th New York - Colonel William P. Wainwright

95th New York - Major Edward Pye

3rd Brigade

Commanding: Brigadier General Marsena Patrick

21st New York - Colonel William F. Rodgers

23rd New York - Colonel Henry C. Hoffman

35th New York - Colonel Newton B. Lord

80th New York - Lt. Colonel Theodore B. Gates

4th Brigade

Commanding: Brigadier General John Gibbon

2nd Wisconsin - Colonel Lucius Fairchild

6th Wisconsin - Lt. Colonel Edward S. Bragg

7th Wisconsin - Captain John Callis

19th Indiana - Colonel Solomon Meredith

First Division Artillery

Commanding: Captain J. Albert Monroe

New Hampshire Light, 1st Battery - Lieutenant Frederick Edgall

1st Rhode Island Light, Battery D - Captain J. Albert Monroe

1st New York Light, Battery L - Captain John A. Reynolds

Battery B, 4th United States Light Artillery - Captain Joseph B. Campbell

Second Division

Commanding: Brigadier General James Ricketts

1st Brigade

Commanding: Brigadier General Abram Duryea

97th New York - Major Charles Northrup

104th New York - Major Lewis C. Skinner

105th New York -

107th Pennsylvania - Captain James MacThomson

2nd Brigade

Commanding: Colonel William Henry Christian

26th New York - Colonel Richard H. Richardson

94th New York -

88th Pennsylvania - Lt. Colonel George W. Gile

90th Pennsylvania - Colonel Peter Lyle

3rd Brigade

Commanding: Brigadier General George L. Hartsuff

12th Massachusetts - Major Elisha Burbank

13th Massachusetts - Major J. Parker Gould

83rd New York -

11th Pennsylvania - Colonel Richard Coulter

Second Division Artillery

1st Pennsylvania Light, Battery F - Captain Ezra W. Matthews

Pennsylvania Light, Battery C - Captain James Thompson

Third Division

Commanding: Brigadier General George G. Meade

1st Brigade

Commanding: Brigadier General Truman Seymour

1st Pennsylvania Reserves (30th P.V.I.) - Colonel R. Biddle Roberts

2nd Pennsylvania Reserves (31st P.V.I.) - Captain James Byrnes

5th Pennsylvania Reserves (34th P.V.I.) - Colonel Joseph W. Fisher

6th Pennsylvania Reserves (35th P.V.I.) - Colonel William Sinclair

13th Pennsylvania Reserves (42nd P.V.I.) - Colonel Hugh W. McNeil

2nd Brigade

Commanding: Colonel Albert Magilton

3rd Pennsylvania Reserve - Lt. Colonel John C. Clark

4th Pennsylvania Reserve - Major John Nyce

7th Pennsylvania Reserve - Colonel Henry C. Bollinger

8th Pennsylvania Reserve - Major Silas M. Baily

3rd Brigade

Commanding: Colonel Thomas F. Gallagher (w)

Commanding: Lt. Colonel Robert Anderson

9th Pennsylvania Reserves - Lt. Colonel Robert Anderson

10th Pennsylvania Reserves - Lt. Colonel Adoniram J. Warner

11th Pennsylvania Reserves - Lt. Colonel Samuel M. Jackson

12th Pennsylvania Reserves - Captain Richard Gustin

Third Division Artillery

1st Pennsylvania Light, Battery A - Lieutenant John G. Simpson

1st Pennsylvania Light, Battery B - Captain James H. Cooper

5th U.S., Battery C - Captain Dunbar R. Ransom

IX Corps (Fox's Gap)

Commanding: Major General Jesse L. Reno (k)

Kanawha Division

Commanding: Major General Jacob Cox

1st Brigade

Commanding: Colonel Eliakim Scammon

12th Ohio - Colonel Carr B. White

23rd Ohio - Lt. Colonel Rutherford B. Hayes

30th Ohio - Colonel Hugh B. Ewing

Ohio Light Artillery, First Battery - Captain James R. McMullin

2nd Brigade

Commanding: Colonel George Crook

11th Ohio - Lt. Colonel Augustus H. Coleman

28th Ohio - Lt. Colonel Gottfried Becker

36th Ohio - Lt. Colonel Melvin Clarke

Kentucky Light Artillery, Simmond's Battery - Captain Seth J. Simmonds

First Division

Commanding: Brigadier General Orlando B. Willcox

1st Brigade

Commanding: Colonel Benjamin Christ

17th Michigan - Colonel William H. Withington

50th Pennsylvania - Major Edward Overton, Jr.

79th New York - Lt. Colonel David Morrison

2nd Brigade

Commanding: Colonel Thomas Welch

8th Michigan - Lt. Colonel Frank Graves

45th Pennsylvania - Lt. Colonel John I. Curtin

46th New York - Lt. Colonel Joseph Gerhardt

100th Pennsylvania - Lt. Colonel David A. Leckey

First Division Artillery - commander unknown

Massachusetts Light Artillery - 8th Battery, Captain Asa Cook

Second Division

Commanding: Brigadier General Samuel D. Sturgis

1st Brigade

Commanding: Brigadier General James Nagle

2nd Maryland - Lt. Colonel J. Eugene Duryea

48th Pennsylvania - Lt. Colonel Joshua K. Sigfried

6th New Hampshire - Colonel Simon G. Griffin

9th New Hampshire - Colonel Enoch Q. Fellows

2nd Brigade

Commanding: Brigadier General Edward Ferrero

21st Massachusetts - Colonel William S. Clark

35th Massachusetts - Colonel Edward A. Wild

51st New York - Colonel Robert Potter

51st Pennsylvania - Colonel John F. Hartranft

Second Division Artillery

Commanding: commander unknown

4th United States Artillery, Battery E - Captain Joseph Clark, Jr.

Pennsylvania Light Artillery, Battery D - Captain George Durell

Third Division

Commanding: Brigadier General Issac Rodman

1st Brigade

Commanding: Colonel Harrison Fairchild

9th New York - Lt. Colonel Edgar Kimball

89th New York - Major Edward Jardine

103rd New York - Major Benjamin Ringold

2nd Brigade

Commanding: Colonel Edward Harland

4th Rhode Island - Colonel William H. P. Steere

11th Connecticut - Colonel Henry Kingsbury

16th Connecticut - Colonel Francis Beach

XI Corps (Crampton's Gap)

Commanding: Major General William B. Franklin

First Division

Commanding: Major General Henry Slocum

1st Brigade

Commanding: Colonel Alfred Torbert

1st New Jersey - Lt. Colonel Mark W. Collet

2nd New Jersey - Colonel Samuel Buck

3rd New Jersey - Colonel Henry Brown

4th New Jersey - Colonel William B. Hatch

2nd Brigade

Commanding: Colonel Joseph J. Bartlett

5th Maine - Colonel Nathaniel J. Jackson

16th New York - Lt. Colonel Joel Seaver

27th New York - Lt. Colonel Alexander D. Adams

121st New York - Colonel Richard H. Franchot

96th Pennsylvania - Colonel Henry L. Cake

3rd Brigade

Commanding: Brigadier General John Newton

18th New York - Lt. Colonel George R. Myers

31st New York - Lt. Colonel Francis E. Pinto

32nd New York - Colonel Roderick N. Matheson

95th Pennsylvania - Lt. Colonel Gustavus W. Town

First Division Artillery

Commanding: Captain Emory Upton

Battery A, Maryland Light Artillery - Captain John W. Wolcott

1st Battery (A), Massachusetts Light Artillery - Captain Josiah Porter

1st Battery (A), New Jersey Light Artillery - Captain William Hexamer

Battery D, 2nd United States Artillery - Lt. Edward B. Williston

Second Division

Commanding: Major General William F. Smith

1st Brigade

Commanding: Brigadier General Winfield S. Hancock

5th Wisconsin - Colonel Amasa Cobb

6th Maine - Colonel Hiram Burnham

43rd New York - Major John Wilson

137th Pennsylvania - Colonel Henry M. Bossert

2nd Brigade

Commanding: Brigadier General William T.H. Brooks

2nd Vermont - Major James H. Walbridge

4th Vermont - Lt. Colonel Charles Stoughton

5th Vermont - Colonel Lewis A. Grant

6th Vermont - Major Oscar Tuttle

3rd Brigade

Commanding: Colonel William Howard Irwin

7th Maine - Major Thomas Hyde

20th New York - Colonel Ernest Von Vegesack

33rd New York - Lt. Colonel Joseph W. Corning

49th New York - Lt. Colonel William C. Alberger

77th New York - Captain Nathan S. Babcock

Second Division Artillery

Commanding: Captain Romeyn M. Ayres

Battery B, Maryland Light Artillery - Lt. Theodore J. Vanneman

1st Independent Battery, New York Light Artillery - Captain Andrew Cowan

Battery F, 5th United States Artillery - Lt. Leonard Martin

Sources

• John David Hoptak, The Battle of South Mountain (Charleston, SC: The History Press, 2011), 183-93.