Seven Days Battles order of battle: Union

The following Union Army units and commanders fought in the Seven Days Battles (from June 25 to July 1, 1862) of the American Civil War. Order of battle compiled from the army organization-return of casualties during the battle and the reports. The Confederate order of battle is listed separately.

Military rank

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

Other

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

Army of the Potomac
MG George B. McClellan, Commanding

General Staff and Headquarters
General Staff
 * Chief of Staff: BG Randolph B. Marcy
 * Chief of Artillery: BG William F. Barry
 * Assistant Adjutant General: BG Seth Williams
 * Chief Quartermaster: BG Stewart L. Van Vliet

General Headquarters
 * Escort
 * Oneida (New York) Cavalry: Cpt James B. McIntyre
 * 4th United States Cavalry (Companies A & E): Cpt James B. McIntyre
 * Provost Marshal General: BG Andrew Porter
 * McClellan Dragoons: Maj Alfred Pleasonton
 * Sturges' Rifles: Maj Granville O. Haller
 * 93rd New York (Companies A, F, H, & K): Maj Granville O. Haller
 * 2nd United States Cavalry: Maj Alfred Pleasonton
 * 8th United States (Companies F & G): Cpt Royal T. Frank; Lt Eugene Carter
 * United States Engineers
 * Battalion United States Engineers: Cpt James C. Duane
 * Engineer Brigade: BG Daniel P. Woodbury
 * 15th New York Engineers: Col John McLeod Murphy
 * 50th New York Engineers: Col Charles B. Stuart

II Corps
BG Edwin V. Sumner

III Corps
BG Samuel P. Heintzelman (w - Glendale)

IV Corps
BG Erasmus D. Keyes

V Corps
BG Fitz J. Porter

VI Corps
BG William B. Franklin

Artillery Reserve
Col Henry J. Hunt