First Deep Bottom Union order of battle

First Division
     BG Francis C. Barlow

   Col James C. Lynch

• 28th Massachusetts: Maj James Flemming
• 26th Michigan: Cpt Lucius H. Ives
• 5th New Hampshire: Maj James E. Larkin
• 61st New York: Maj George W. Scott
• 81st Pennsylvania: Ltc William Wilson
• 140th Pennsylvania: Cpt Thomas Henry [on picket duty; not engaged]
• 183rd Pennsylvania: Ltc George T. Egbert
• 2nd New York Heavy Artillery: Maj George Hogg

   Col Clinton D. MacDougall^[2]

• 39th New York: Cpt David A. Allen
• 52nd New York: Cpt George Degener
• 57th New York: Cpt L. Hart Wilder [not engaged]
• 63rd New York (6 companies): Cpt Alexander Watts
• 69th New York (6 companies): Cpt Albert Gosse
• 88th New York: Ltc Denis F. Burke
• 111th New York: Cpt Marcus W. Murdock
• 125th New York: Cpt Nelson Penfield
• 126th New York: Cpt John B. Geddis

   Ltc Knut Oscar Broady

• 2nd Delaware (5 companies):
• 64th New York: Ltc William Glenny
• 66th New York: Cpt Nathaniel P. Lane
• 53rd Pennsylvania: Cpt Philip H. Schreyer [not engaged]
• 145th Pennsylvania: Cpt James H. Hamlin
• 148th Pennsylvania: Cpt Alfred A. Rhinehart
• 7th New York Heavy Artillery: Ltc Joseph H. Murphy
• 116th Pennsylvania: Cpt David W. Megraw

Second Division
     MG John Gibbon
Provost guard:
2nd Company Minnesota Sharpshooters: Cpt Mahlon Black

   Ltc Francis E. Pierce

• 19th Maine: Cpt Joseph W. Spaulding
• 15th Massachusetts: Maj Isaac Harris Hooper
• 19th Massachusetts:
• 20th Massachusetts:
• 1st Company Andrew Sharpshooters (Massachusetts):
• 7th Michigan:
• 1st Minnesota Battalion (2 companies): Cpt James C. Farwell
• 42nd New York:
• 59th New York:
• 82nd New York:
• 184th Pennsylvania:
• 36th Wisconsin:

   Col Mathew Murphy

• 8th New York Heavy Artillery: Maj Erastus M. Spaulding [not engaged]
• 155th New York: Maj John Byrne
• 164th New York: Maj John Beattie
• 170th New York: Cpt John Coonan [not engaged]
• 182nd New York Heavy Artillery: Col Mathew Murphy

   Col Thomas A. Smyth

• 14th Connecticut: Cpt John C. Broatch [not engaged]
• 1st Delaware:
• 12th New Jersey:
• 10th New York (6 companies):
• 108th New York:
• 8th Ohio:
• 69th Pennsylvania: Cpt Patrick S. Tinen
• 106th Pennsylvania: Cpt John B. Breitenbach
• 7th West Virginia:

Third Division
     BG Gershom Mott

   BG Régis de Trobriand

• 20th Indiana:
• 17th Maine:
• 40th New York: Cpt Madison M. Cannon [not engaged]
• 73rd New York: Ltc Michael W. Burns
• 86th New York:
• 124th New York:
• 99th Pennsylvania: Col Edwin Ruthwin Biles
• 110th Pennsylvania:
• 2nd U.S. Sharpshooters:
• 4th New York Heavy Artillery (5 companies): Maj Frank Williams

   Col Daniel Chaplin (until July 28)^[3]
   Col Henry J. Madill (July 28)

• 5th Michigan: Col John Pulford
• 93rd New York: Maj Samuel McConihe
• 57th Pennsylvania: Ltc William B. Neeper
• 63rd Pennsylvania:
• 105th Pennsylvania: Cpt John C. Conser
• 141st Pennsylvania: Col Henry J. Madill
• 1st U.S. Sharpshooters: Cpt John Wilson
• 1st Massachusetts Heavy Artillery: Maj Nathaniel Shatswell
• 1st Maine Heavy Artillery: Ltc Thomas H. Talbot [transferred to 1st Brigade, July 28]

   Col Robert McAllister

• 16th Massachusetts:
• 5th New Jersey: Cpt Thomas C. Godfrey
• 6th New Jersey:
• 7th New Jersey: Cpt Thomas C. Thompson
• 8th New Jersey: Maj Virgil M. Healy
• 11th New Jersey: Col Robert McAllister, Ltc John Schoonover (from July 30)

   Col William R. Brewster

• 11th Massachusetts (5 companies): Col William Blaisdell
• 71st New York:
• 72nd New York (3 companies):
• 74th New York:
• 84th Pennsylvania: Ltc George Zinn

   Maj John G. Hazard

• 6th Maine Light: Cpt Edwin B. Dow
• 10th Battery, Massachusetts Light: Cpt Henry J. Sleeper
• 1st Battery, New Hampshire Light: Cpt Frederick M. Edgell
• Battery B, 1st New Jersey Light: Cpt A. Judson Clark
• 3rd Battery, New Jersey Light: Cpt Christian Woerner
• 4th New York Heavy: Cpt John B. Vande Wieler
• Battery G, 1st New York Light: Cpt Nelson Ames
• 11th Battery, New York Light: Cpt John E. Burton
• 12th Battery, New York Light: Cpt George F. McKnight
• Battery F, 1st Pennsylvania Light: Cpt P. Bruce Ricketts
• Battery A, 1st Rhode Island Light: Lt William S. Perrin
• Battery B, 1st Rhode Island Light: Cpt Thomas Frederick Brown
• Battery K, 4th U.S. Light: Cpt John W. Roder
• Battery C, 5th U.S. Light:
• Battery I, 5th U.S. Light:

Second Cavalry Division
     BG David McMurtrie Gregg

   BG Henry Eugene Davies

• 1st Massachusetts Cavalry:
• 1st New Jersey Cavalry:
• 10th New York Cavalry:
• 6th Ohio Cavalry: Col William Stedman
• 1st Pennsylvania Cavalry:

   Col John Irvin Gregg

• 1st Maine Cavalry:
• 2nd Pennsylvania Cavalry:
• 4th Pennsylvania Cavalry:
• 8th Pennsylvania Cavalry:
• 13th Pennsylvania Cavalry:
• 16th Pennsylvania Cavalry:

First Division

   BG Robert Sanford Foster

• 10th Connecticut: Col John L. Otis
• 11th Maine: Maj Jonathan A. Hill
• 1st Maryland Cavalry (dismounted):
• 24th Massachusetts: Col Francis A. Osborn
• 100th New York:

Second Division

   BG Henry Warner Birge

• 9th Connecticut:
• 12th Maine:
• 14th Maine:
• 26th Massachusetts:
• 14th New Hampshire:
• 75th New York:

Cavalry Division
     BG August Kautz

   Col Robert M. West

• 3rd New York Cavalry: Cpt John M. Wilson
• 5th Pennsylvania Cavalry (detachment): Col Robert M. West

   Col Samuel P. Spear

• 1st District of Columbia Cavalry: Maj J. Stannard Baker
• 11th Pennsylvania Cavalry (detachment):

• 4th Massachusetts Cavalry, Company F:
• 4th Massachusetts Cavalry, Company G:
• 1st New York Mounted Rifles:

• 4th Wisconsin Battery (1st section): Cpt George B. Easterly
• 4th Wisconsin Battery (2nd section): Lt William P. Powers