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I Corps

II CORPS

III Corps

IV Corps

V Corps

Army of The Potomac, 18 May 1862

Army of the Potomac, 8 Mar 1862
MG George B. McClellan

Cavalry Reserve

BG P. St George Cooke

Emory’s Bde. Blake’s Bde.
5th US Cavalry 1st US Cavalry
6th US Cavalry 8th Pennsylvania Cavalry
6th Pennsylvania Cavalry Barker’s Squadron Illinois Cavalry

Artillery Reserve

Colonel Henry J. Hunt

Name of Unit Battery Weapon
Graham’s Battery, K & G, 1st US Artillery: 6 Napoleons
Randol’s Battery, E, 1st US Artillery: 6 Napoleons
Carlisle’s Battery, E, 2nd US Artillery: 6 3-inch ordinance guns
Benson’s Battery, M, 2nd US Artillery: 6 3-inch ordinance guns
Tidbal’s Battery, A, 2nd US Artillery: 6 3-inch ordinance guns
Edwards’ Battery, L & M, 3rd US Artillery: 6 10-pds. Parrotts
Gibson’s Battery, C & G, 3rd US Artillery: 6 3-inch ordinance guns
Livingston’s Battery, F & K, 3rd US Artillery: 4 10-pds Parrotts
Howe’s Battery, G, 4th US Artillery: 6 Napoleons
De Russy’s Battery,, K, 4th US Artillery: 6 Napoleons
Weed’s Battery, I, 5th US Artillery: 6 Napoleons
Smead’s Battery, K, 5th US Artillery: 4 Napoleons
Ames’ Battery, A, 5th US Artillery: 6: 4 10-pds Parrotts, 2 Napoleons
Diederick’s Battery, A, N.Y. Artillery Battalion, 6 20-pds Parrotts
Voegelie’s Battery, B, N.Y. Artillery Battalion, 4 20-pds Parrotts
Knieriem’s Battery, C, N.Y. Artillery Battalion, 6 3-inch ordinance guns
Grimm’s Battery, D, N.Y. Artillery Battalion, 6 32-pds Howitzers

Military Units

Unit Type Leader's Name Military Unit
Artillery with Siege Train Col R. O. Tyler 1st Connecticut Heavy Artillery
Volunteer Engineer Troops General D. P. Woodbury 15th N.Y. Volunteers
Volunteer Engineer Troops General D. P. Woodbury 50th N.Y. Volunteers
Regular Engineer Troops Captain Duane Co.s A, B & C, US Engineers
Provost Guard 2nd US Cavalry
Provost Guard 17th US Infantry

I Corps

BG Irvin McDowell

Unit Type Military Unit Name
Cavalry 1st N.Y. Cavalry
Cavalry 2nd N.Y. Cavalry
Cavalry 4th N.Y. Cavalry
Cavalry 1st Penn. Cavalry
Cavalry Sharpshooters
Cavalry 2nd Regiment Berdan’s Sharpshooters

BG William B. Franklin’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Platt’s Battery 2nd US Artillery 6 Napoleons
Artillery Porter’s Battery A, Mass. Artillery 6: 4 10pds Parrotts, 2 12-pds howitzers
Artillery Hexamer’s Battery A, N.J. Artillery 6: 4 10pds Parrotts, 2 12-pds howitzers
Artillery Wilson’s Battery 1st N.Y. Artillery 4 3-inch ordnance guns
Infantry BG Philip Kearney 1st N.J. Vol.
Infantry BG Philip Kearney 2nd N.J. Vol.
Infantry BG Philip Kearney 3rd N.J. Vol.
Infantry BG Philip Kearney 4th N.Y. Vol
Infantry BG Henry W. Slocum 16th N.Y. Vol.
Infantry BG Henry W. Slocum 27th N.Y. Vol.
Infantry BG Henry W. Slocum 5th Maine Vol.
Infantry BG Henry W. Slocum 96th Penn. Vol.
Infantry BG John Newton 18th N.Y. Vol.
Infantry BG John Newton 31st N.Y. Vol.
Infantry BG John Newton 32nd N.Y. Vol.
Infantry BG John Newton 95th Penn. Vol. (Goslines’ Zuoaves)

BG George A. McCall’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Seymore’s Battery C 5th US Artillery 6 Napoleons
Artillery Eaton’s Battery A, 1st Penn. Artillery 4 Napoleons
Artillery Cooper’s Battery B, 1st Penn. Artillery 6 10-pds Parrotts
Artillery Kein’s Battery C, 1st Penn, Artillery 6: 2 10-pds Parrotts, 4 12-pds howitzers
Infantry BG John F. Reynolds 1st Penn. Res. Regt.
Infantry BG John F. Reynolds 2nd Penn. Res. Regt.
Infantry BG John F. Reynolds 5th Penn. Res. Regt.
Infantry BG John F. Reynolds 8th Penn. Res. Regt.
Infantry BG George Meade 3rd Penn. Res. Regt.
Infantry BG George Meade 4th Penn. Res. Regt.
Infantry BG George Meade 7th Penn. Res. Regt.
Infantry BG George Meade 11th Penn. Res. Regt
Infantry BG George Meade 1 Penn. Reserve Rifles
Infantry Ord 6th Penn. Res. Regt.
Infantry Ord 9th Penn. Res. Regt.
Infantry Ord 10th Penn. Res. Regt.
Infantry Ord 12th Penn. Res. Regt.

King’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Gibbon’s Battery B, 4th US Artillery 6 Napoleons
Artillery Monroe’s Battery D, 1st R.I. Artillery 6 10-pds Parrotts
Artillery Gerrish’s Battery A, N.H. Artillery 6 Napoleons
Artillery Durrell’s Battery Penn Artillery 6 10-pds Parrotts
Infantry Bde 2nd Wis. Vol.
Infantry Bde 6th Wis. Vol
Infantry Bde 7th Wis. Vol.
Infantry Bde 19th Ind. Vol.
Infantry Patrick’s Bde 20th N.Y. State Militia
Infantry Patrick’s Bde 21st N.Y. Vol
Infantry Patrick’s Bde 23rd N.Y. Vol.
Infantry Patrick’s Bde 25th N.Y. Vol.
Infantry Auger’s Bde 14th N.Y. State Militia (Zouaves)
Infantry Auger’s Bde 22nd N.Y. Vol
Infantry Auger’s Bde 24th N.Y. Vol.
Infantry Auger’s Bde 30th N.Y. Vol.

II CORPS

BG Edwin V. “Bull” Sumner

Unit Type Military Unit Name
Cavalry 8th Illinois Cavalry, Col. Farnsworth
Cavalry Squadron, 6th New York Cavalry

BG Israel B. Richardson’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Clark’s Battery A & C, 4th US Artillery 6 Napoleons
Artillery Frank’s Battery G, 1st New York Artillery 6 10-pds Parrotts
Artillery Pettit’s Battery B, 1st New York Artillery 6 10-pds Parrotts
Artillery Hogan’s A 2nd New York Artillery 6 10-pds Parrotts
Infantry BG Howard 5th N.H. Vol.
Infantry BG Howard 81st Penn. Vol.
Infantry BG Howard 61st N.Y. Vol.
Infantry BG Howard 64th N.Y. Vol
Infantry BG Thomas F. Meagher (Irish) 69th N.Y. Vol.
Infantry BG Thomas F. Meagher (Irish) 63rd N.Y. Vol.
Infantry BG Thomas F. Meagher (Irish) 88th N.Y. Vol.
Infantry BG William H. French 52nd N.Y. Vol.
Infantry BG William H. French 57th N.Y. Vol.
Infantry BG William H. French 66th N.Y. Vol.
Infantry BG William H. French 53rd Penn.Vol.

BG John Sedgwick’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Kirby’s Battery I, 1st US Artillery 6 Napoleons
Artillery Tompkin’s Battery A, 1st R.I. Artillery 6: 4 10-pds Parrotts, 2 12-pds howitzers
Artillery Bartlett’s Battery B, 1st R.I. Artillery 6: 4 10-pds Parrotts, 2 12-pds howitzers
Artillery Owen’s Battery G, 1st R.I. Artillery 6 3-inch ordnance guns
Infantry BG Gorman 2nd N.Y. State Militia
Infantry BG Gorman 15th Mass. Vol.
Infantry BG Gorman 34th N.Y. Vol.
Infantry BG Gorman 1st Minn. Vol.
Infantry BG William W. Burns 69th Penn. Vol.
Infantry BG William W. Burns 71st Penn. Vol.
Infantry BG William W. Burns 72nd Penn. Vol. (Zouaves)
Infantry BG William W. Burns 106th Penn. Vol.
Infantry BG N. J. T. Dana 19th Mass. Vol.
Infantry BG N. J. T. Dana 7th Mich. Vol.
Infantry BG N. J. T. Dana 42nd N.Y. Vol
Infantry BG N. J. T. Dana 20th Mass. Vol.

III Corps

BG Samuel P. Heintzelman

Unit Type Military Unit Name
Cavalry 3rd Pennsylvania Cavalry. Col. Averill

BG Fitz John Porter’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Griffin’s Battery K, 5th US Artillery 6 10-pds Parrotts
Artillery Weeden’s Battery C, R.I. Artillery 6 10-pds Parrotts
Artillery Martin’s Battery C, Mass. Artillery 6 Napoleons
Artillery Allen’s Battery E, Mass. 6 3-inch ordnance guns
Infantry BG John H. Martindale 2nd Maine Vol
Infantry BG John H. Martindale 18th Mass. Vol.
Infantry BG John H. Martindale 22nd Mass. Vol.
Infantry BG John H. Martindale 25th N.Y. Vol.
Infantry BG John H. Martindale 13th N.Y. Vol
Infantry BG John H. Martindale 1st Berdan Sharpshooters
Infantry BG George W. Morell 14th N.Y. Vol. (Zuoaves)
Infantry BG George W. Morell 4th Mich. Vol.
Infantry BG George W. Morell 9th Mass. Vol.
Infantry BG George W. Morell 62nd Penn. Vol. (Zouaves)
Infantry BG Daniel Butterfield 17th N.Y. Vol.
Infantry BG Daniel Butterfield 83rd Penn. Vol. (Zouaves)
Infantry BG Daniel Butterfield 44th N.Y. Vol.
Infantry BG Daniel Butterfield Stockton’s Michigan
Infantry BG Daniel Butterfield 12th N.Y. Vol.

BG Joseph Hooker’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Hall’s Battery H, 1st US Artillery 6: 4 10-pds Parrotts, 2 12-pds howitzers
Artillery Smith’s battery 4th N.Y. Battery 6 10-pds Parrotts
Artillery Bramhall’s Battery 6th N.Y. Battery 6 3-inch ordnance guns
Artillery Osborn’s Battery D, 1st N.Y. Artillery 4 3-inch ordnance guns
Infantry BG Daniel E. Sickles 1st Excelsior (N.Y.)
Infantry BG Daniel E. Sickles 2nd Excelsior (N.Y.)
Infantry BG Daniel E. Sickles 3rd Excelsior (N.Y.)
Infantry BG Daniel E. Sickles 4th Excelsior (N.Y.)
Infantry BG Daniel E. Sickles 5th Excelsior (N.Y.)
Infantry BG Cuvier Grover 1st Mass. Vol.
Infantry BG Cuvier Grover 11th Mass. Vol.
Infantry BG Cuvier Grover 26th Penn. Vol
Infantry BG Cuvier Grover 2nd N.H. Vol.
Infantry BG Francis E. Patterson 5th N.J. Vol.
Infantry BG Francis E. Patterson 6th N.J. Vol.
Infantry BG Francis E. Patterson 7th N.J. Vol.
Infantry BG Francis E. Patterson 8th N.J. Vol

BG Charles S. Hamilton’s Division

BG Philip Kearney

Unit Type Unit Leader Name of Unit Weapons
Artillery Thompson’s Battery G, 2nd US Artillery 6 Napoleons
Artillery Bean’s Battery B, N.J. Artillery 6: 4 10-pds Parrotts, 2 Napoleons
Artillery Randolph’s Battery E, R.I. Artillery 6: 4 10-pds Parrotts, 2 Napoleons
Infantry BG Charles D. Jameson 105th Penn. Vol.
Infantry BG Charles D. Jameson 63rd Penn. Vol.
Infantry BG Charles D. Jameson 57th Penn. Vol.
Infantry BG Charles D. Jameson 87th N.Y. Vol.
Infantry BG David B. Birney 38th N.Y. Vol.
Infantry BG David B. Birney 40th N.Y. Vol
Infantry BG David B. Birney 3rd Maine Vol.
Infantry BG David B. Birney 4th Maine Vol.
Infantry BG Hiram G. Berry 2nd Mich Vol.
Infantry BG Hiram G. Berry 3rd Mich Vol.
Infantry BG Hiram G. Berry 5th N.Y. Vol. (Duryee’s Zouaves)
Infantry BG Hiram G. Berry 37th N.Y. Vol.

IV Corps

BG Erasmus D. Keyes

BG Darius N. Couch’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery McCarthy’s Battery C, 1st Penn 4 10-pds Parrotts
Artillery Flood’s Battery D, 1stPenn. Artillery 6 10-pds parrotts
Artillery Miller’s battery E, 1st Penn. Artillery 4 Napoleons
Artillery Brady’s Battery F, 1st Penn. Artillery 4 10-pds Parrotts
Infantry COL Julius W. Adams 67th N.Y. Vol. (1st L.I.)
Infantry COL Julius W. Adams 65th N.Y. Vol. (1st US Chas)
Infantry COL Julius W. Adams 23rd Penn. Vol.
Infantry COL Julius W. Adams 31st Penn. Vol.
Infantry COL Julius W. Adams 61st Penn. Vol.
Infantry BG John J. Peck 98th Penn. Vol.
Infantry BG John J. Peck 102nd Penn. Vol.
Infantry BG John J. Peck 93rd Penn. Vol
Infantry BG John J. Peck 62nd N.Y. Vol.
Infantry BG John J. Peck 55th N.Y. Vol.
Infantry BG Charles Devens 2nd R.I. Vol.
Infantry BG Charles Devens 7th Mass. Vol.
Infantry BG Charles Devens 10th Mass. Vol.
Infantry BG Charles Devens 36th N.Y. Vol.

BG William F. “Baldy” Smith’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Ayers’ Battery F, 5th US Artillery 6: 4 10-pds Parrotts, 2 Napoleons
Artillery Mott’s Battery 3rd N.Y. Battery 6: 4 10-pds Parrotts, 2 Napoleons
Artillery Wheeler’s Battery E, 1st N.Y. Artillery 4 3-inch ordnance guns
Artillery Kennedy’s Battery 1st N.Y. Battery 6 3-inch ordnance guns
Infantry BG Winfield Scott Hancock 5th Wis. Vol.
Infantry BG Winfield Scott Hancock 49th Penn. Vol
Infantry BG Winfield Scott Hancock 43rd N.Y. Vol.
Infantry BG Winfield Scott Hancock 6th Maine Vol
Infantry BG W. T. H. Brook 2nd Vermont Vol.
Infantry BG W. T. H. Brook 3rd Vermont Vol.
Infantry BG W. T. H. Brook 4th Vermont Vol.
Infantry BG W. T. H. Brook 5th Vermont Vol.
Infantry BG W. T. H. Brook 6th Vermont Vol.
Infantry BG John W. Davidson 33rd N.Y. Vol.
Infantry BG John W. Davidson 77th N.Y. Vol.
Infantry BG John W. Davidson 49th N.Y. Vol.
Infantry BG John W. Davidson 7th Maine Vol.

BG Silas Casey’ Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Regan’s Battery 7th N.Y. Battery 6 3-inch ordnance guns
Artillery Fitch’s Battery 8th N.Y. Battery 6 3-inch ordnance guns
Artillery Bates Battery A, 1st N.Y. Artillery 6 Napoleons
Artillery Spratt’s Battery H, 1st N.Y. Artillery 4 3-inch ordnance
Infantry BG William H. Keim 85th Penn. Vol.
Infantry BG William H. Keim 101st Penn. Vol.
Infantry BG William H. Keim 103rd Penn. Vol.
Infantry BG William H. Keim 96th N.Y. Vol.
Infantry BG Innis N. Palmer 85th N.Y. Vol.
Infantry BG Innis N. Palmer 98th N.Y. Vol
Infantry BG Innis N. Palmer 92nd N.Y. Vol.
Infantry BG Innis N. Palmer 81st N.Y. Vol.
Infantry BG Innis N. Palmer 93rd N.Y. Vol
Infantry BG Henry M. Naglee 104th Penn. Vol.
Infantry BG Henry M. Naglee 52nd Penn. Vol.
Infantry BG Henry M. Naglee 56th N.Y. Vol.
Infantry BG Henry M. Naglee 100th N.Y. Vol.
Infantry BG Henry M. Naglee 11th Maine Vol.

V Corps

BG Nathaniel P. Bank

Unit Type Military Unit Name
Cavalry 1st Maine Cavalry
Cavalry 1st Vermont Cavalry
Cavalry 1st Michigan Cavalry
Cavalry 1st Rhode Island Cavalry
Cavalry Squadron Virginia Cavalry
Cavalry 5th New York Cavalry
Cavalry 8th New York Cavalry
Cavalry Keyes’ Battalion Penn. Cavalry
Cavalry 18th Co.s Maryland Cavalry
Unattached 28th Penn. Vol. 4th Regt Potomac Home Guard (Maryland Vol.)

William’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Best’s Battery F, 4th US Artillery 6 Napoleons
Artillery Hampton’s Battery Maryland 4 10-pds Parrotts
Artillery Thompson’s Battery Maryland 4 10-pds Parrotts
Artillery Mathews’ Battery F, Penn 6 3-inch ordnance
Artillery M, 1st New York Artillery, 6 10-pds Parrott
Artillery Knapp’s Battery Penn. 6 10-pds Parrotts
Artillery McMahon’s Battery New York 6 3-inch ordnance
Infantry BG John J. Abercombie 12th Mass. Vol.
Infantry BG John J. Abercombie 2nd Mass. Vol.
Infantry BG John J. Abercombie 16th Ind. Vol
Infantry BG John J. Abercombie 1st Potomac Home Guard Bde (Md Vol.)
Infantry BG John J. Abercombie 1st Co. Zouaves d’Afrique (Penn. Vol.)
Infantry Bde 9th N.Y. State Militia
Infantry Bde 29th Penn. Vol.
Infantry Bde 27th Ind. Vol.
Infantry Bde 3rd Wis Vol.
Infantry Bde 28th N.Y. Vol.
Infantry Bde 5th Conn. Vol.
Infantry Bde 46th Penn. Vol.
Infantry Bde 1st Md. Vol.
Infantry Bde 12th Ind. Vol.
Infantry Bde 13th Mass. Vol.

Shield’s Division

Unit Type Unit Leader Name of Unit Weapons
Artillery Clark’s Battery E, 4th US Artillery 6 10-pds Parrotts
Artillery Jenke’s Battery A, 1st Virginia Artillery 6: 4 10-pds Parrotts, 2 6-pds
Artillery Davy’s Battery B, 1st Virginia Artillery 2 10-pds Parrotts
Artillery Huntington’s Battery A, 1st Ohio 6 13-pds James
Artillery Robinson’s Battery L, 1st Ohio 6: 2 12-pds howitzers, 4 6-pds
Artillery 4th Ohio Infantry 1 6-pds
Infantry Bde 14th Ind. Vol.
Infantry Bde 4th Ohio Vol.
Infantry Bde 8th Ohio Vol.
Infantry Bde 7th Va. Vol.
Infantry Bde 67th Ohio Vol
Infantry Bde 84th Penn. Vol.
Infantry Bde 5th Ohio Vol.
Infantry Bde 62nd Ohio Vol.
Infantry Bde 66th Ohio Vol.
Infantry Bde 13th Ind. Vol.
Infantry Bde 39th Ill. Vol.
Infantry Bde 7th Ohio Vol.
Infantry Bde 29th Ohio Vol.
Infantry Bde 7th Ohio Vol.
Infantry Bde 1st Va. Vol.
Infantry Bde 11th Penn. Vol.
Infantry Bde Andrew Sharpshooters

Army of The Potomac, 18 May 1862

II Corps

BG Edwin V. “Bull” Sumner

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG Isreal B. Richardson’s First Division BG John C. Caldwell BG Thomas F. Meagher BG William H. French
BG John Sedgewick’s Second Division BG Alfred Sulley BG William W. Burns BG N. J. T. Dana

III Corps

BG Samuel P. Heintzelman

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG Joseph Hooker’s Second Division BG Cuvier Grover BG Daniel E. Sickles COL Joseph B. Carr
BG Philip Kearney’s Third Division BG John C. Robinson BG David B. Birney BG Hiram G. Berry

IV Corps

BG Erasmus D. Keyes

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG Darius N. Couch’s First Division BG Albion P. Howe BG John J. Abercombie BG Innis N. Palmer
BG John J. Peck’s Second Division BG Henry M. Naglee BG Henry W. Wessells

V Corps

BG Fitz John Porter

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG George W. Morell’s First Division BG John H. Martindale BG Charles Griffin BG Daniel Butterfield
BG George Syke’s Second (Regulars) Division COL Robert C. Buchanan LTC William Chapman COL Gouverneur K. Warren
BG George B. McCall’s Third Division (attached from I Corps) BG John F. Reynolds BG George G. Meade BG Truman Seymour

VI Corps

BG William B. Franklin

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG Henry W. Slocum’s First Division BG George W. Taylor COL Joseph J. Bartlett BG John Newton
BG William F. “Baldy” Smith’s Division BG Winfield S. Hancock BG W. T. H. Brooks BG John W. Davidson

I Corps

BG Irvin McDowell

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG William B. Franklin’s Division BG Philip Kearney BG Henry W. Slocum BG John Newton
BG George A. McCall’s Division BG John F. Reynolds BG George Meade BG Ord
BG King’s Division Bde BG Patrick BG Auger

II Corps

BG Edwin V. “Bull” Sumner

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG Isreal B. Richardson’s First Division BG Howard BG Thomas F. Meagher BG William H. French
BG John Sedgewick’s Second Division BG Gorman BG William W. Burns BG N. J. T. Dana

III Corps

BG Samuel P. Heintzelman

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG Fitz John Porter’s Division BG John H. Martindale BGT George W. Morell BG Daniel Butterfield
BG Joseph Hooker’s Division BG Cuvier Grover BG Daniel E. Sickles BG Francis E. Patterson
BG Charles S. Hamilton Division BG Charles D. Jameson BG David B. Birney BG Hiram G. Berry

IV Corps

BG Erasmus D. Keyes

Division Commander Brigade Commander Brigade Commander Brigade Commander
BG Darius N. Couch’s Division COL Julius W. Adams BG John J. Peck BG Charles Devens
BG William F. “Baldy” Smith’s Division BG Winfield S. Hancock BG W. T. H. Brooks BG John W. Davidson
BG Silas Casey’s Division BG William H. Keim BG Innis N. Palmer BG Henry M. Naglee

McClellan’s Logistics package

Types Types Types Types
389 vessels
1,224 vehicles
14,592 animals
121,500 men
5 locomotives
80 rail cars.
103 Siege cannons: 100- 200 pds Parrot guns 8–13-inch seacoast mortars 4.5-inch Rodman siege rifles