United States Army


< to September • October 1862 • to November >

Commanded by Major General George B. McClellan

Headquarters & Staff

Headquarters Staff
Chief of Staff Brigadier General Randolph B. Marcy
Chief of Artillery Brigadier General Henry J. Hunt
Chief of Cavalry Brigadier General John Buford
Chief Engineer Captain James C. Duane
Inspector General Colonel Delos B. Sacket
Assistant Adjutant General Lieutenant Colonel Albert V. Coburn
Chief Quartermaster Lieutenant Colonel Rufus Ingalls
Topographer Captain Charles R. Lowell
Medical Director Surgeon Jonathan Letterman
Chief of Signals Major Albert J. Meyer
Guards & Orderlies  Captain James B. McIntyre
McClellan Dragoons (Illinois)
Sturgis (Illinois) Rifles
Oneida (New York) Cavalry Company Captain Daniel P. Mann
1st United States Cavalry, Cos. BCH&I Captain Marcus A. Reno
4th United States Cavalry, Cos. A & E Captain James B. McIntyre
Provost Guard Major William H. Wood
93rd New York Infantry, Cos. AFH&K Lieutenant Colonel Benjamin C. Butler
8th United States Infantry, Cos. ABDF&G Captain Royal T. Frank
19th United States Infantry Cos. G&H Captain Edmund L. Smith (Co. G)
Captain Henry S. Welton (Co. H)
2nd United States Cavalry Regiment Captain George Gordon
Engineer Brigade Brigadier General Daniel Woodbury
15th New York Engineer Regiment Colonel John M. Murphy
50th New York Engineer Regiment Lieutenant Colonel William H. Pettes
Regular Engineer Battalion Captain James C. Duane
Siege Artillery
1st Connecticut Heavy Artillery, AB&M Brigadier General Randolph B. Marcy  from Defences Washington
Reserve Artillery
5th United States Artilery, Battery K from 5 Corps, 2 Div.

First Corps

Brigadier General John F. Reynolds
1st Division Brigadier General Abner Doubleday
2nd Division Brigadier General N. Taylor
3rd Division Brigadier General George Meade

Second Corps

Major General Edwin V. Sumner (to 10/7)
Major General Darius N. Couch
1st Division Brigadier General Winfield S. Hancock
2nd Division Brigadier General Oliver O. Howard
3rd Division Brigadier General William H. French

Third Corps

Major General Samuel P. Heintzelman (to 10/30)
Brigadier General George Stoneman
1st Division Brigadier General George Stoneman (^ 10/20)
Brigadier General David Birney
2nd Division Brigadier General Daniel Sickles

Fifth Corps

Major General Fitz John Porter
1st Division Brigadier General George W. Morrell (to 10/30)
Brigadier General Charles Griffin
2nd Division Brigadier General George Sykes
3rd Division Brigadier General Andrew A. Humphreys

Sixth Corps

Major General William B. Franklin
1st Division Brigadier General Hennry W. Slocum (to 10/15)
Brigadier General John Newton (10/15 – 10/18)
Brigadier General William T. H. Brooks
2nd Division Brigadier General William F. Smith
3rd Division Brigadier General Darius N. Couch (to 10/18)
Brigadier General John Newton

Ninth Corps

Brigadier General Jacob D. Cox (to 10/18)
Brigadier General Orlando D. Wilcox
1st Division Brigadier General Orlando Wilcox (^ 10/18)
Colonel William F. Fenton (10/18 – 10/24)
Colonel Daniel Leasure
2nd Division Brigadier General Samuel D. Sturgis 
3rd Division Major General John G. Parke
Brigadier General George W. Getty
Kanawha Division Colonel Eliakim Scammon returned to West Virginia

Eleventh Corps

Major General Franz Sigel
1st Division Brigadier General Julius H. Stahel
2nd Division Brigadier General Adolph Von Steinwehr
3rd Division Brigadier General Carl Schurz

Twelfth Corps

Brigadier General Alpheus S. Williams (to 10/20)
Major General Henry W. Slocum
1st Division Brigadier General George Gordon (to 10/20)
Brigadier General Alpheus Williams
2nd Division Brigadier General George Greene (to 10/15)
Brigadier General John W. Geary

Cavalry Division 

Brigadier General Alfred Pleasonton
First Brigade Major Charles A. Whiting
5th United States Cavalry Regiment
6th United States Cavalry Regiment
Second Brigade Colonel John F. Farnsworth
8th Illinois Cavalry Regiment Major Lawrence Williams
3rd Indiana Cavalry Regiment
1st Masachusetts Cavalry Regiment
8th Pennsylvania Cavalry Regiment
Third Brigade Colonel Richard Rush
4th Pennsylvania Cavalry Regiment
6th Pennsylvania Cavalry Regiment Colonel Richard H. Rush
9th New York Cavalry Regiment
Fourth Brigade Colonel A. T. McReynolds
1st New York Cavalry Regiment to Defences Upper Potomac
12th Pennsylvania Cavalry Regiment
Fifth Brigade Colonel Benjamin F. Davis

8th New York Cavalry Regiment

3rd Pennsylvania Cavalry Regiment
Bayard’s Brigade Brigadier General George D. Bayard
1st Maine Cavalry Regiment ieutenant Colonel Calvin R. Douty
1st New Jersey Cavalry Regiment Colonel Percy Wyndham
2nd New York Cavalry Regiment Colonel Judson Kilpatrick
10th New York Cavalry Regiment
1st Pennsylvania Cavalry Regiment Colonel Owen Jones
Orton’s District of Columbia Cavalry Co.
Artillery
2nd United States Artillery, Battery A
2nd United States Artillery, Batteries B&L
2nd United States Artillery, Battery M
3rd United States Artillery, Batteries C&G