The following Union Army units and commanders were the initial structure on April 4, 1862 of the Union Department of the Potomac during the Peninsula campaign of the American Civil War . This list includes units deployed to the Virginia Peninsula, and those that remained in the Washington area.[1] The Confederate order of battle is listed separately.
Abbreviations used [ ]
Military rank [ ]
Army of the Potomac [ ]
The following units were the initial organization of the Army of the Potomac on the peninsula.
MG George B. McClellan , Commanding
Headquarters and Body Guard
Co. A, 4th U.S. Cavalry : Lt James B. McIntire
Co. E, 4th U.S. Cavalry : Lt William O'Connell
Oneida Independent Cavalry Company: Cpt Daniel P. Mann
Sturges' Rifles : Cpt James Steele
Provost Guard
2nd U.S. Cavalry : Maj Alfred Pleasonton
Battalion of 8th U.S. Infantry (Cos. F & G) and 17th U.S. Infantry (Cos. B & D): Maj George L. Willard
Staff [ ]
Col Randolph B. Marcy , Chief of Staff
Maj Granville O. Haller , Commandant of General Headquarters
Function
Individuals
Adjutant
BG Seth Williams
Ltc James A. Hardie (aide-de-camp)
Cpt Richard B. Irwin
Inspector General
Col Delos B. Sackett
Engineers
BG John G. Barnard
Topographical Engineers
BG Andrew A. Humphreys
Lt Henry L. Abbot
Lt Orlando G. Wagner
Lt Nicholas Bowen
Lt John Moulder Wilson
Lt James H. Wilson
Medical Corps
Charles S. Tripler
Surgeons and Nurses
Quartermaster
Maj Stewart Van Vliet
Commissary
Col Henry F. Clarke
Col Amos Beckwith
Ltc George Bell
Ltc A. Parker Porter
Cpt Thomas Wilson
Cpt Brownell Granger
Cpt William H. Bell
Cpt John H. Woodward
Cpt W.R. Murphy
Ordnance
Cpt Charles P. Kingsbury
Lt Thomas G. Baylor
Other unnamed officers
Provost-Marshal
BG Andrew Porter
Maj William H. Wood
Cpt James W. McMillan
Cpt William T. Gentry
Cpt James W. Forsyth
Lt John W. Jones
Lt Charles F. Trowbridge
Lt Calvin D. Mehaffey
Judge Advocate
Col Thomas T. Gantt
Signal Corps
Maj Albert J. Myer
Telegraphic Office
Maj Thomas Eckert
Balloon Corps
Professor Thaddeus S.C. Lowe
Personal Staff
Col Thomas M. Key
Col Edward H. Wright
Col John J. Astor, Jr. [2]
Ltc Albert V. Colburn
Ltc Nelson B. Sweitzer
Ltc Edward McK. Hudson
Ltc Paul Von Radowitz
Maj Herbert Von Hammerstein
Maj William W. Russell (USMC)
Maj Ferdinand Lecompte (Swiss Army Engineer)
Cpt George A. Custer
Cpt Joseph Kirkland
Cpt Arthur McClellan
Cpt Louis Philippe d'Orleans
Cpt Robert d'Orleans
Cpt Martin T. McMahon
Cpt William P. Mason, Jr.
Cpt William F. Biddle
Cpt Edward A. Raymond
II Corps [ ]
Main article: II Corps (ACW)
BG Edwin Sumner , Commanding
Ltc Joseph H. Taylor, Adjutant
Division
Brigade
Regiments and others
First Division
BG Israel B. Richardson
First Brigade
BG Oliver O. Howard
5th New Hampshire : Col Edward E. Cross
81st Pennsylvania : Col James Miller
61st New York : Col Francis C. Barlow
64th New York : Col Thomas J. Parker
Second Brigade
BG Thomas Francis Meagher
Third 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
Artillery
Batteries A & C, 4th U.S. Artillery : Cpt Francis N. Clarke
Battery G, 1st New York Artillery : Cpt John D. Frank
Battery B, 1st New York Artillery: Cpt Rufus D. Pettit
Battery A, 2nd New York Artillery:[3] Cpt William H. Hogan
Second Division
BG John Sedgwick
First Brigade
BG Willis A. Gorman
2nd New York State Militia:[4] Col George W.B. Tompkins
15th Massachusetts : Col Charles Devens
1st Minnesota : Col Alfred Sully
Second Brigade
BG William Wallace Burns
Third Brigade
BG Napoleon J.T. Dana
19th Massachusetts : Col Edward W. Hinks
20th Massachusetts : Col William R. Lee
7th Michigan : Col Ira R. Grosvenor
42nd New York : Col Edmund C. Charles
Artillery
Battery I, 1st U.S. Artillery : Lt Edmund Kirby
Battery A, 1st Rhode Island Artillery : Cpt John A. Tompkins
Four 10-lb Parrotts, two 12-lb howitzers
Battery B, 1st Rhode Island Artillery : Cpt Walter O. Bartlett
Four 10-lb Parrotts, two 12-lb howitzers
Battery G, 1st Rhode Island Artillery : Cpt Charles Owen
Cavalry reserve
Unbrigaded
8th Illinois Cavalry : Col John F. Farnsworth
6th New York Cavalry (Cos. D & K): Maj Floyd Clarkson
N.B. The Third Division under BG Louis Blenker was detached in early April and transferred to the Mountain Department
III Corps [ ]
Main article: III Corps (ACW)
BG Samuel P. Heintzelman , Commanding
Cpt Chauncey McKeever, Chief of Staff
Division
Brigade
Regiments and others
First Division
BG Fitz John Porter
First Brigade
BG John H. Martindale
Second Brigade
BG George W. Morell
Third Brigade
BG Daniel Butterfield
17th New York : Col H. Seymour Lansing
44th New York : Col Stephen W. Stryker
12th New York: Col Henry A. Weeks
83rd Pennsylvania : Col John W. McLane
16th Michigan : Col Thomas B. Stockton
1st Berdan Sharpshooters : Col Hiram Berdan
Artillery
Cpt Charles Griffin
Battery D, 5th U.S. Artillery : Cpt Charles Griffin
Battery C, 1st Rhode Island Artillery : Cpt William B. Weeden
Battery C, Massachusetts Artillery: Cpt Augustus C. Martin
Battery E, Massachusetts Artillery: Cpt George D. Allen
Second Division
BG Joseph Hooker
First Brigade
BG Henry Morris Naglee
1st Massachusetts : Col Robert Cowden
11th Massachusetts : Col George Clark, Jr.
26th Pennsylvania: Col William F. Small
2nd New Hampshire : Col Gilman Marston
Second Brigade
BG Daniel Sickles
Third Brigade ("2nd New Jersey Brigade")
Col Samuel H. Starr
5th New Jersey : Col William Joyce Sewell
6th New Jersey : Col James T. Hatfield
7th New Jersey : Col Joseph W. Revere
8th New Jersey : Col Adolphus J. Johnson
Artillery
Cpt Norman J. Hall
Battery H, 1st U.S. Artillery : Cpt Norman J. Hall
Four 10-lb Parrotts, two 12-lb howitzers
4th New York Independent Battery: Cpt James E. Smith
6th New York Independent Battery: Cpt William M. Bramhall
Battery D, 1st New York Artillery: Cpt Thomas W. Osborn
Four 3-inch ordnance guns
Third Division
BG Charles Smith Hamilton
First Brigade
Col Charles D. Jameson
105th Pennsylvania : Col Amor A. McKnight
63rd Pennsylvania : Col Alexander Hays
57th Pennsylvania : Col Charles T. Campbell
87th New York: Col Stephen Hodge
Second Brigade
BG David B. Birney
38th New York: Col J. H. Hobart Ward
40th New York : Col Edward J. Riley
3rd Maine : Col Moses B. Lakeman
4th Maine : Ltc Elijah Walker
Third Brigade
BG Hiram G. Berry
Artillery
Cpt James Thompson
Battery G, 2nd U.S. Artillery : Cpt James Thompson
: Cpt John E. Beam
Four 10-lb Parrotts, two Napoleons
Battery E, 1st Rhode Island Artillery : Cpt George E. Randolph
Four 10-lb Parrotts, two Napoleons
Cavalry reserve
Unbrigaded
Porter's Division was combined with Sykes' Division of the Reserve Corps and McCall's Division of the First Corps to form the Fifth Corps (Provisional) on May 18, 1862.
IV Corps [ ]
Main article: IV Corps (ACW)
BG Erasmus D. Keyes , Commanding
Ltc Charles C. Suydam
Division
Brigade
Regiments and others
First Division
BG Darius N. Couch
First Brigade
Col Henry Shaw Briggs
Second Brigade
BG
67th New York : Col Julius W. Adams
65th New York: Col John Cochrane
23rd Pennsylvania : Col Thomas H. Neill
31st Pennsylvania : Col David H. Williams
61st Pennsylvania: Col Oliver H. Rippey
Third Brigade
BG John J. Peck
98th Pennsylvania: Col John F. Ballier
102nd Pennsylvania: Col Thomas A. Rowley
93rd Pennsylvania: Col James M. McCarter
62nd New York : Col John L. Riker
55th New York : Col P. Regis de Trobriand
Artillery
Battery C, 1st Pennsylvania Artillery: Cpt Jeremiah McCarthy
Battery D, 1st Pennsylvania Artillery: Cpt Edward H. Flood
Battery E, 1st Pennsylvania Artillery: Cpt Theodore Miller
Battery H, 1st Pennsylvania Artillery: Cpt James Brady
Second Division
BG W.F. "Baldy" Smith
First Brigade
BG Winfield Scott Hancock
5th Wisconsin : Col Amasa Cobb
49th Pennsylvania: Col William H. Irwin
43rd New York : Col Francis L. Vinton
6th Maine : Col Hiram Burnham
Second Brigade
BG William T.H. Brooks
2nd Vermont : Col
3rd Vermont : Ltc Breed N. Hyde
4th Vermont : Col Edwin H. Stoughton
5th Vermont : Col Henry A. Smalley
6th Vermont : Ltc Nathan S. Lord
Third Brigade
BG John Davidson
Artillery
Cpt Romeyn B. Ayres
Battery F, 5th U.S. Artillery : Cpt Romeyn B. Ayres
Four 10-lb Parrotts, two Napoleons
3rd New York Independent Battery: Cpt Thaddeus P. Mott
Four 10-lb Parrotts, two Napoleons
Battery E, 1st New York Artillery: Cpt Charles C. Wheeler
Four 3-inch ordnance guns
1st New York Independent Battery: Cpt Terance J. Kennedy
Third Division
BG Silas Casey
First Brigade
Col William W.H. Davis
104th Pennsylvania: Ltc John W. Neilds
52nd Pennsylvania : Col John C. Dodge
56th New York : Col Charles Van Wyck
100th New York : Col James M. Brown
11th Maine : Col John C. Caldwell
Second Brigade
BG William High Keim
85th Pennsylvania : Col Joshua B. Howell
101st Pennsylvania: Col Joseph H. Williams
103rd Pennsylvania: Col Theodore F. Lehmann
96th New York: Col James Fairman
Third Brigade
BG Innis N. Palmer
85th New York: Col Jonathan S. Belknap
98th New York : Col William Dutton
92nd New York: Col Jonah Sanford
81st New York: Col Edwin Rose
93rd New York : Col John S. Crocker
Artillery
Col Guilford D. Bailey
7th New York Independent Battery: Cpt Peter C. Regan
8th New York Independent Battery: Cpt Butler Fitch
Battery A, 1st New York Artillery: Cpt Thomas H. Bates
Battery H, 1st New York Artillery: Cpt Joseph Spratt
Four 3-inch ordnance guns
Cavalry Reserve
Unbrigaded
6th New York Cavalry (Cos. F & H): ?
W.F. Smith's Division was combined with Franklin's Division of the First Corps to form the Sixth Corps (Provisional) on May 18, 1862.
Reserves [ ]
Division
Brigade
Regiments and others
Cavalry
BG Philip St. George Cooke
First Brigade
BG William H. Emory
5th U.S. Cavalry : Cpt Charles J. Whiting
6th U.S. Cavalry : Maj Lawrence A. Williams
6th Pennsylvania Cavalry : Col Richard H. Rush
Second Brigade
Col George A.H. Blake
Artillery
Col Henry J. Hunt
Horse Artillery Brigade
Ltc William Hays
Battery M, 2nd U.S. Artillery : Cpt Henry Benson
Six 3-inch ordnance rifles
Batteries C & G, 3rd U.S. Artillery : Cpt Horatio G. Gibson
Six 3-inch ordnance rifles
Second Brigade
Ltc George W. Getty
Battery K , 1st U.S. Artillery : Cpt William M. Graham
Batteries E & G, 1st U.S. Artillery : Lt Alanson M. Randol
Battery E, 2nd U.S. Artillery : Cpt J. Howard Carlisle
Batteries L & M, 3rd U.S. Artillery : Cpt John Edwards, Jr.
Batteries F & K, 3rd U.S. Artillery : Cpt La Rhett L. Livingston
Battery G, 4th U.S. Artillery : Lt Charles H. Morgan
Battery K, 4th U.S. Artillery : Lt Francis W. Seeley
Battery I, 5th U.S. Artillery : Cpt Stephen H. Weed
Battery K, 5th U.S. Artillery : Cpt John R. Smead
Battery A, 5th U.S. Artillery : Cpt Adelbert Ames
Four 10-lb Parrotts, two Napoleons
Third Brigade
Maj Albert Arndt
Battery A, 1st New York Artillery Battalion: Cpt Otto Diedrich
Battery B, 1st New York Artillery Battalion: Cpt Adolph Voegele
Battery C, 1st New York Artillery Battalion: Cpt John Knieriem
Battery D, 1st New York Artillery Battalion: Cpt Edward Grimm
Engineers
Volunteers
BG Daniel Phineas Woodbury
Regulars
Cpt James Chatham Duane
Co. A, U.S. Engineers: Lt Chauncey B. Reese
Co. B, U.S. Engineers: Lt Charles E. Cross
Co. C, U.S. Engineers: Lt Orville E. Babcock
Artillery Siege Train
Infantry
Regulars
BG George Sykes
2nd U.S. Infantry (9 companies): Ltc William Chapman
3rd U.S. Infantry (7 companies): ?
4th U.S. Infantry (10 companies): Ltc Robert C. Buchanan
6th U.S. Infantry (10 companies): Cpt Levi C. Bootes
10th & 17th U.S. Infantry (8 companies): ?
11th U.S. Infantry (6 companies): Cpt DeLancey Floyd-Jones
12th U.S. Infantry (8 companies): ?
14th U.S. Infantry (9 companies): ?
5th New York (Duryee's Zouaves) : Col Gouverneur K. Warren
Sykes' Division was combined with Porter's Division of the Third Corps and McCall's Division of the First Corps to form the Fifth Corps (Provisional) on May 18, 1862.
Other Troops from the Department of the Potomac [ ]
The following troops were part of the Department of the Potomac in March and April 1861, but were detached to maintain defense of the Potomac River line.
I Corps [ ]
On April 4, the First Corps was renamed the Department of the Rappahannock, with authority to include the District of Columbia, Maryland between the Potomac and Patuxent, and Virginia between the Blue Ridge and the Fredericksburg & Richmond Railroad.
MG Irvin McDowell , Commanding
Ltc Edmund Schriver, Chief of Staff
Unattached cavalry
1st New York Cavalry : Col Andrew T. McReynolds
2nd New York Cavalry : Col J. Mansfield Davies
4th New York Cavalry: Col Christian F. Dickel
Sharpshooters
Division
Brigade
Regiments and others
First Division
BG William B. Franklin
First Brigade
BG Philip Kearny
1st New Jersey : Lt Col Robert McAllister
2nd New Jersey: Col Isaac M. Tucker
3rd New Jersey : Col George W. Taylor
4th New Jersey: Col James H. Simpson
Second Brigade
BG Henry Slocum
Third Brigade
BG John Newton
18th New York: Col William H. Young
31st New York : Col Calvin E. Pratt
32nd New York : Col Roderick N. Matheson
95th Pennsylvania : Col John M. Gosline
Artillery
Cpt Edward R. Platt
Battery D, 2nd U.S. Artillery : Cpt Edward R. Platt
Battery A, Massachusetts Artillery: Cpt Josiah Porter
Four 10-lb Parrotts, two 12-lb howitzers
Battery A, New Jersey Artillery : Cpt William Hexamer
Four 10-lb Parrotts, two 12-lb howitzers
Battery F, 1st New York Artillery: Brady or Cpt William R. Wilson?
Four 3-inch ordnance guns
Second Division
(Pennsylvania Reserves )
BG George A. McCall
First Brigade
BG John F. Reynolds
Second Brigade
BG George Meade
Third Brigade
BG Edward Ord
6th Pennsylvania Reserves: Col William Sinclair
9th Pennsylvania Reserves: Col Conrad F. Jackson
10th Pennsylvania Reserves: Col John S. McCalmont
12th Pennsylvania Reserves: Col John H. Taggart
Skirmishers
Artillery
Cpt Truman Seymour
Battery C, 5th U.S. Artillery : Cpt Truman Seymour
Battery A, 1st Pennsylvania Artillery: Cpt Hezekiah Easton
Battery B, 1st Pennsylvania Artillery: Cpt James H. Cooper
Battery G, 1st Pennsylvania Artillery: Cpt Mark Kern
Third Division
BG Rufus King
First Brigade
BG Christopher C. Augur
Second Brigade
BG Marsena R. Patrick [5]
80th New York : Col George W. Pratt
21st New York: Col William F. Rogers
23rd New York : Col Henry C. Hoffman
35th New York : Col William C. Brown
Third Brigade
BG John Gibbon
Artillery
Battery B, 4th U.S. Artillery : Lt Joseph B. Campbell
Battery D, 1st Rhode Island Artillery : Cpt John A. Monroe
Battery A, New Hampshire Artillery : Cpt George A. Gerrish
Durell's Independent Battery (D), Pennsylvania Artillery: Cpt George W. Durrell?
McCall's Division transferred to the Peninsula and was combined with Porter's Division of the Third Corps and Sykes' Division of the Reserve Corps to form the Fifth Corps (Provisional) on May 18, 1862. Franklin's Division transferred to the Peninsula and was combined with W.F. Smith's Division of the Fourth Corps to form the Sixth Corps (Provisional) on May 18, 1862.
V Corps [ ]
On April 4, the Fifth Corps was renamed the Department of Shenandoah with authority over Maryland between the Blue Ridge and Flintstone Creek, Virginia between the Blue Ridge and the modern-day border with West Virginia.
MG Nathaniel P. Banks , Commanding
Cpt Louis H. Pelouze, Acting Assistant Adjutant General
Unattached Infantry
28th Pennsylvania: Col John W. Geary
4th Regiment Potomac Home Brigade (Maryland): ?
Division
Brigade
Regiments and others
First Division
BG Alpheus S. Williams
First Brigade
Col Dudley Donnelly
28th New York : Ltc Edwin F. Brown
5th Connecticut : Col George D. Chapman
46th Pennsylvania : Col Joseph F. Knipe
12th Indiana : ?
13th Massachusetts : Col Samuel H. Leonard
Second Brigade
BG John Joseph Abercrombie
Third Brigade
Col George Henry Gordon
83rd New York : Col John W. Stiles
29th Pennsylvania: Col John K. Murphy
27th Indiana : Col Silas Colgrove
3rd Wisconsin : Col Thomas H. Ruger
Artillery
Cpt Clermont L. Best
Battery F, 4th U.S. Artillery : Cpt Clermont L. Best
1st Maryland Battery (Independent Battery F, Pennsylvania Artillery): Cpt Robert B. Hampton
2nd Maryland Battery (Independent Battery C, Pennsylvania Artillery): Cpt James Thompson
Battery F, 1st Pennsylvania Artillery : Cpt Ezra W. Matthews
Battery M, 1st New York: Cpt George W. Cothran
Independent Battery E, Pennsylvania Artillery: Cpt Joseph E. Knapp
15th Independent Battery, New York Artillery: Cpt Henry J. McMahon
Second Division
BG James Shields
First Brigade
Col Nathan Kimball
Second Brigade
Col Jeremiah C. Sullivan
Third Brigade
Col Erastus B. Tyler
7th Ohio : Ltc William R. Creighton
29th Ohio : Col Louis P. Buckley
7th Indiana : Col James Gavin
1st Virginia : Col Joseph Thoburn
110th Pennsylvania : Col William D. Lewis
Andrew Sharpshooters : Cpt John Saunders
Artillery
Cpt Joseph C. Clark
Cavalry
Unbrigaded
1st Maine Cavalry : Col Samuel H. Allen
1st Vermont Cavalry : Col Lemuel Platt
1st Michigan Cavalry : Col Thornton F. Brodhead
1st Pennsylvania Cavalry : Col George D. Bayard
1st Rhode Island Cavalry : Col Alfred N. Duffié
5th New York Cavalry: Col Othniel De Forest
8th New York Cavalry : Col Samuel J. Crook
Keys' Battalion, Pennsylvania Cavalry: Lt Hugh Keys
Eighteen companies, Maryland Cavalry: Col Henry A. Cole
One company, Virginia Cavalry : Col Henry Anisansel
Shields' Division was transferred to the Department of the Rappahannock on May 10, 1862
District of Washington [ ]
BG James S. Wadsworth , Commanding
Regiments and others
Camp Location
1st New Jersey Cavalry : Col William Halstead
Alexandria City
4th Pennsylvania Cavalry : Col James H. Childs
East of the Capitol
10th New Jersey : Col William Bryan
Bladensburg Road
104th New York : Col John Rohrbach
Kalorama Heights
1st Wisconsin Heavy Artillery : ?
Fort Cass (Alexandria Co. )
New York Artillery (three batteries): ?
Depot of New York Light Artillery: ?
Camp Barry
2nd District of Columbia: Col Charles M. Alexander
Washington City
26th Pennsylvania: Col William F. Small
G Street Wharf
26th New York : Col William H. Christian
Fort Lyon (present-day Huntington )
95th New York: Col George H. Biddle
Camp Thomas
94th New York: Col Henry K. Viele
Detachment of 88th Pennsylvania : Maj George W. Gile
Alexandria City
91st Pennsylvania : Col Edgar I. Gregory
Franklin Square Barracks (Franklin Square )
4th New York Heavy Artillery : Col T.D. Doubleday
Fort Carroll (present-day Joint Base Anacostia-Bolling )
Fort Greble (also present-day JBAB)
112th Pennsylvania: Col Charles Angeroth
Fort Saratoga
76th New York : Ltc John D. Shaul
Fort Massachusetts (Washington Co.)
59th New York : Col William L. Tidball
Fort Pennsylvania (Tenleytown )
Detachment of 88th Pennsylvania : ?
Fort Good Hope
99th Pennsylvania : Col Peter Fritz
Fort Mahon
2nd New York Light Artillery: ?
107th Pennsylvania: Col Thomas A. Zeigel
54th Pennsylvania : Col Jacob M. Campbell
Kendall Green (present-day Gallaudet University )
Dickenson's Light Artillery (16th Independent New York Battery)
86th New York : Col Benajah P. Baily
Detachment of 88th Pennsylvania : Col George P. McLean
East of the Capitol
1st Massachusetts Heavy Artillery : Col Thomas R. Tannatt
56th Pennsylvania: Col Sullivan A. Meredith
Fort Washington (present-day Fort Washington, Maryland )
97th New York : Col Charles W. Wheelock
101st New York: Col Enrico Fardella
91st New York : Col Jacob Van Sandt[7]
12th Virginia : Col John B. Klunk
Fort Corcoran (present-day Rosslyn )
Railroad Guards
Col Dixon S. Miles
6th New York Cavalry (Cos. A, B, C, E, G, I, K, & M dismounted): Col Thomas Devin
10th New York Cavalry (dismounted): Col John Lemmon [8]
11th New York Cavalry (dismounted): Col James B. Swain
2nd Pennsylvania Cavalry (dismounted): Col Richard Butler Price
Troops Around Baltimore [ ]
On March 22, the Middle Department was created with authority over Pennsylvania, New Jersey, Delaware, and the Eastern Shore of Maryland and Virginia, as well as the Maryland counties of Cecil, Hartford, Baltimore, and Anne Arundel. Dix remained in command.
MG John A. Dix , Commanding
Maj Daniel Tompkins Van Buren , Chief of Staff and Acting Assistant Adjutant General
Type of Units
Regiments and others
Cavalry
1st Maryland Cavalry : Cpt Henry A. Cole?
Purnell (Maryland) Legion Cavalry: Cpt Robert E. Duvall
Artillery
Battery I, 2nd U.S. Artillery : ?
Battery A, Maryland Light Artillery : Cpt John W. Wolcott
Battery L, 1st New York Artillery: Cpt John A. Reynolds
Independent Battery ?, Pennsylvania Artillery: ?
Independent Battery ?, Pennsylvania Artillery: ?
Infantry
3rd New York : Col Samuel M. Alford
4th New York : Col Alfred W. Taylor
11th Pennsylvania : Col Richard Coulter
87th Pennsylvania : Col George Hay
111th Pennsylvania: Col Matthew Schlaudecker
Detachment, 21st Massachusetts : ?
2nd Delaware : Col W. Henry Wharton
2nd Maryland : Col John Sommer
1st Eastern Shore Home Guard (Maryland): Col James Wallace
2nd Eastern Shore Home Guard (Maryland): Col Robert S. Rogers
Purnell (Maryland) Legion Infantry: Col Samuel L. Graham
Department of Virginia [ ]
The Department of Virginia constituted an area 60 miles from Fort Monroe. McClellan had received permission to absorb it into his army as a division of the First Corps, but it was rescinded shortly after he arrived on the Peninsula.
MG John E. Wool , Commanding
Location
Regiments and others
Fort Monroe
Maj Joseph Roberts
Camp Hamilton
Col Max Weber
1st Delaware : Col John W. Andrews
16th Massachusetts : Col Powell T. Wyman
1st Michigan : Col John C. Robinson
20th New York : Ltc Francis Weiss
99th New York (6 cos.): Col David W. Wardop
58th Pennsylvania : Col John R. Jones
Battery D, 4th U.S. Artillery: Cpt Frederick M. Follett
11th Pennsylvania Cavalry : Col Joseph Harlan
1st New York Mounted Rifles (4 cos.):[9] Maj Charles C. Dodge
Camp Butler
BG Joseph K. F. Mansfield
20th Indiana : Col William L. Brown
5th Maryland: Col William L. Schley
29th Massachusetts : Col Ebenezer W. Peirce
1st New York : Col Garrett Dyckman
2nd New York : Col Joseph B. Carr
7th New York : Col Edward Kapff
11th New York : Col Charles McK. Loeser
Battery L, 4th U.S. Artillery: Cpt Robert V.W. Howard
Fort Wool
Ltc Gustave B. Helleday
99th New York (2 cos.): Ltc Gustave B. Helleday
References [ ]
^ Multiple commander names indicate command succession of command during the battle or the campaign.
^ The custom of the time was to attach the suffix "junior" to the younger living family member of the same name, not keep it consistent.
^ Later renamed 14th Independent Battery New York Artillery
^ In May the 90-day regiment would be mustered out and then mustered in as the 82nd New York , a three-year regiment
^ McClellan lists these units as being part of the New York State Militia, since all had previously served as ninety-days regiments with different numbers. But by March, they had all been mustered in as three-years regiments with these unit numbers .
^ No such battery is recorded outside of McClellan's official report. Ohio did not form a 4th Regiment of Artillery.
^ Listed by McClellan as present at the time of the Peninsula campaign, though it had already departed for Florida
^ Listed by McClellan as present at the time of the Peninsula campaign, though it was actually in Gettysburg at the time and would not join the Department of the Potomac until August.
^ Companies A, B, C, and D of the New York Mounted Rifles were all that had been recruited. Companies E and H were added in August, and Companies I through M were added in September.