Battle of Chancellorsville order of battle: Union

The following Union Army units and commanders fought in the Battle of Chancellorsville of the American Civil War. The Confederate order of battle is listed separately. Order of battle compiled from the army organization during the battle, the casualty returns, and the reports.

Military rank

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

Other

 * w = wounded
 * mw = mortally wounded
 * k = killed
 * c = captured

Army of the Potomac
MG Joseph Hooker

General Staff and Headquarters
General Staff:
 * Chief of Staff: MG Daniel Butterfield
 * Assistant Adjutant General: BG Seth Williams
 * Chief Quartermaster: BG Rufus Ingalls
 * Chief of Engineers: BG Gouverneur K. Warren
 * Bureau of Military Information: Col George H. Sharpe
 * Medical Director: Maj Jonathan Letterman

General Headquarters:

Command of the Provost-Marshal-General: BG Marsena R. Patrick
 * 93rd New York: Col John S. Crocker
 * 8th United States, Companies A, B, C, D, F, and G: Cpt Edwin W. H. Read
 * 6th Pennsylvania Cavalry, Companies E and I: Cpt James Starr
 * Detachment Regular Cavalry: Lt Tattnall Paulding

Patrick's Brigade: Col William F. Rogers
 * 21st New York: Ltc Chester W. Steinberg
 * 23rd New York: Col Henry C. Hoffman
 * 35th New York: Col John G. Todd
 * 80th New York (20th Militia): Col Theodore B. Gates
 * Maryland Light Artillery, Battery B: Cpt Alonzo Snow
 * Ohio Light Artillery, 12th Battery: Cpt Aaron C. Johnson

Engineer Brigade: BG Henry W. Benham
 * 15th New York Engineers: Col Clinton G. Colgate
 * 50th New York Engineers: Col Charles B. Stuart
 * United States Engineer Battalion: Cpt Chauncey B. Reese

Signal Corps: Cpt Samuel T. Cushing

Ordnance Detachment: Lt John R. Edie, Jr.

Guards and Orderlies:
 * Oneida (New York) Cavalry: Cpt Daniel P. Mann

I Corps
MG John F. Reynolds

Chief of Artillery: Col Charles S. Wainwright

Escort:
 * 1st Maine Cavalry, Company L: Cpt Constantine Taylor

II Corps
MG Darius N. Couch

Chief of Artillery and Assistant Inspector-General: Ltc Charles H. Morgan

Escort:
 * 6th New York Cavalry, Companies D and K: Cpt Riley Johnson

III Corps
MG Daniel Sickles

Chief of Artillery: Cpt George E. Randolph

V Corps
MG George Meade

Chief of Artillery: Cpt Stephen H. Weed

Escort:
 * 17th Pennsylvania Cavalry (2 companies): Cpt William Thompson

VI Corps
MG John Sedgwick

Chief of Artillery: Col Charles H. Tompkins

Escort: Maj Hugh H. Janeway
 * 1st New Jersey Cavalry, Company L: Lt Voorhees Dye
 * 1st Pennsylvania Cavalry, Company H: Cpt William S. Craft

XI Corps
MG Oliver O. Howard

Chief of Artillery: Ltc Louis Schirmer

Escort:
 * 1st Indiana Cavalry, Companies I and K: Cpt Abram Sharra

XII Corps
MG Henry W. Slocum

Chief of Artillery: Cpt Clermont L. Best

Provost Guard:
 * 10th Maine Battalion (3 companies): Cpt John D. Beardsley

Cavalry Corps
BG George Stoneman

Artillery
BG Henry J. Hunt