Bristoe campaign order of battle: Union

The following units and commanders fought in the Bristoe campaign of the American Civil War on the Union side. The Confederate order of battle is shown separately. When multiple names of commanders are shown, this indicates the succession of command through the Campaign.

Military rank abbreviations used

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

Army of the Potomac
MG George G. Meade, Commanding

General Staff and Headquarters
General Staff and Headquarters
 * Chief of Staff: MG Andrew A. Humphreys
 * Chief of Artillery: BG Henry J. Hunt
 * Assistant Adjutant General: BG Seth Williams
 * Chief Quartermaster: BG Rufus Ingalls
 * Provost Marshal General: BG Marsena R. Patrick
 * 80th New York (20th Militia): Ltc Jacob B. Hardenbergh
 * 93rd New York: Ltc Benjamin C. Butler
 * 2nd Pennsylvania Cavalry: Ltc Joseph B. Printon
 * 6th Pennsylvania Cavalry (detachment)
 * Detachments Regular Cavalry and Volunteer Cavalry
 * Engineer Brigade: BG Henry W. Benham
 * 15th New York (battalion): Capt Joseph Wood Jr.
 * 50th New York: Col William H. Pettes
 * U.S. Battalion: Capt George H. Mendell
 * Guards and Orderlies
 * Oneida (New York) Cavalry: Capt Daniel P. Mann
 * Signal Corps: Capt Lemuel B. Norton

I Corps

 * MG John Newton
 * Escort: 4th and 16th Pennsylvania Cavalry (detachments)

II Corps

 * MG Gouverneur K. Warren (temporarily absent; returned October 12)
 * BG John C. Caldwell
 * Escort:
 * 10th New York Cavalry, Company M: Lt James Matthews
 * 13th Pennsylvania Cavalry, Company G: Lt Robert Brown

III Corps

 * MG William H. French

V Corps

 * MG George Sykes
 * Escort: 5th Michigan Cavalry (squadron): Lt Samuel Harris
 * Provost Guard: 12th New York (Companies D and E): Cpt Henry W. Ryder

VI Corps

 * MG John Sedgwick
 * Escort: 1st Vermont Cavalry (detachment): Capt Andrew J. Grover

Cavalry Corps

 * MG Alfred Pleasonton
 * Headquarters Guard: 6th US: Maj Robert M. Morris

Artillery Reserve

 * BG Robert O. Tyler