General in Chief - LTG Ulysses S. Grant

IX Corps - MG Ambrose Burnside

First Division
     BG Thomas G. Stevenson (k)
     Col Daniel Leasure
     BG Thomas L. Crittenden

1st Brigade
   Ltc Stephen M. Weld, Jr.

- 35th Massachusetts

- 56th Massachusetts

- 57th Massachusetts

- 59th Massachusetts

- 4th United States

- 10th United States

2nd Brigade
   Col Daniel Leasure

- 3rd Maryland

- 21st Massachusetts

- 100th Pennsylvania

Artillery

- 2nd Maine Battery

- 14th Massachusetts Battery

Second Division
     BG Robert B. Potter

1st Brigade
   Col Zenas Bliss
   Col John I. Curtin

- 36th Massachusetts

- 58th Massachusetts

- 51st New York

- 45th Pennsylvania

- 48th Pennsylvania

- 7th Rhode Island

2nd Brigade
   Col Simon Goodell Griffin

- 31st Maine

- 32nd Maine

- 6th New Hampshire

- 9th New Hampshire

- 11th New Hampshire

- 17th Vermont

Artillery

- 11th Massachusetts Battery

- 19th New York Battery

Third Division
     BG Orlando B. Wilcox

1st Brigade
   Col John F. Hartranft

- 2nd Michigan

- 8th Michigan

- 17th Michigan

- 27th Michigan

- 109th New York

- 51st Pennsylvania

2nd Brigade
   Col Benjamin C. Christ
   Col William Humphrey

- 1st Michigan Sharpshooters

- 20th Michigan

- 79th New York

- 60th Ohio

- 50th Pennsylvania

Artillery

- Battery G, 7th Maine Light

- 34th New York Battery

Fourth Division
     BG Edward Ferrero

1st Brigade
   Col Joshua K. Sigfried

- 27th U.S. Colored Troops

- 30th U.S. Colored Troops

- 39th U.S. Colored Troops

- 43rd U.S. Colored Troops

2nd Brigade
   Col Henry G. Thomas

- 30th Connecticut (Colored)

- 19th U.S. Colored Troops

- 23rd U.S. Colored Troops

Artillery

- Battery D, Pennsylvania Independent Light

- 3rd Vermont Battery

Army of the Potomac - MG George G. Meade

Provost Guard
BG Marsena R. Patrick

- 1st Massachusetts Cavalry, Companies C and D

- 20th New York State Militia (80th NY Volunteers)

- 3rd Pennsylvania Cavalry

- 68th Pennsylvania

- 114th Pennsylvania

Reserve Artillery
Col Henry S. Burton

- Disbanded and distributed among the infantry corps May 16.

1st Brigade
   Col J. Howard Kitching

- 6th New York Heavy Artillery

- 15th New York Heavy Artillery

2nd Brigade
   Maj John A. Tompkins

- Battery E, 5th Maine

- Battery A, 1st New Jersey Light

- Battery B, 1st New Jersey Light

- 5th New York Battery

- 12th New York Battery

- Battery B, 1st New York Light

3rd Brigade
   Maj Robert H. Fitzhugh

- 9th Massachusetts Battery

- 11th New York Battery

- 15th New York Battery

- Battery C, 1st New York Light

- Battery H, 1st Ohio Light

- Battery E, 5th United States

Volunteer Engineer Brigade
BG Henry W. Benham

- 50th New York Engineers

- Battalion U.S. Engineers

1st Vermont Cavalry, Company M

First Division
     BG Francis C. Barlow

1st Brigade
   Col Nelson A. Miles

- 26th Michigan

- 61st New York

- 81st Pennsylvania

- 140th Pennsylvania

- 183rd Pennsylvania

2nd Brigade (Irish Brigade)
   Col Thomas A. Smyth (transferred to command of 3rd Brigade, 2nd Division May 17th)
   Col Richard Byrnes

- 28th Massachusetts

- 63rd New York

- 69th New York

- 88th New York

- 116th Pennsylvania

3rd Brigade
   Col Paul Frank (relieved for drunkenness)
   Col Hiram R. Brown (c)
   Col Clinton D. MacDougall

- 39th New York

- 52nd New York

- 57th New York

- 111th New York

- 125th New York

- 126th New York

4th Brigade
   Col John R. Brooke

- 2nd Delaware

- 64th New York

- 66th New York

- 53rd Pennsylvania

- 145th Pennsylvania

- 148th Pennsylvania

Second Division
     BG John Gibbon

2nd Company Minnesota Sharpshooters

1st Brigade
   BG Alexander S. Webb (w)
   Col H. Boyd McKeen

- 19th Maine

- 1st Company Sharpshooters

- 15th Massachusetts

- 19th Massachusetts

- 20th Massachusetts

- 7th Michigan

- 42nd New York

- 59th New York

- 82nd New York

- 36th Wisconsin

2nd Brigade (Philadelphia Brigade)
   BG Joshua T. Owen

- 152nd New York

- 69th Pennsylvania

- 71st Pennsylvania

- 72nd Pennsylvania

- 106th Pennsylvania

3rd Brigade (Gibraltar Brigade)
   Col Samuel S. Carroll (w)
   Col Theodore G. Ellis
   Col Thomas A. Smyth

- 14th Connecticut

- 1st Delaware

- 14th Indiana

- 12th New Jersey

- 10th New York Battalion

- 4th Ohio

- 8th Ohio

- 7th West Virginia

4th Brigade (Corcoran Legion) (arrived May 17)
   Col Mathew Murphy (w)
   Col James P. McIvor

- 155th New York

- 164th New York

- 170th New York

- 182nd New York

Third Division
     BG David B. Birney

1st Brigade
   BG J. H. Hobart Ward
   Col Thomas W. Egan

- 20th Indiana

- 3rd Maine

- 40th New York

- 86th New York

- 124th New York

- 99th Pennsylvania

- 110th Pennsylvania

- 141st Pennsylvania

- 2nd U.S. Sharpshooters

2nd Brigade
   Col John S. Crocker (replaced May 18)
   Col Elijah Walker

- 4th Maine

- 17th Maine

- 3rd Michigan

- 5th Michigan

- 93rd New York

- 57th Pennsylvania

- 63rd Pennsylvania

- 105th Pennsylvania

- 1st U.S. Sharpshooters

Fourth Division
     BG Gershom Mott
     Division incorporated into Third Division on May 13. Mott assumed command of McAllister's Brigade.

1st Brigade (3rd Brigade of Third Division)
   Col Robert McAllister

- 1st Massachusetts

- 16th Massachusetts

- 5th New Jersey

- 6th New Jersey

- 7th New Jersey

- 8th New Jersey

- 11th New Jersey

- 26th Pennsylvania

- 115th Pennsylvania

2nd Brigade (4th Brigade of Third Division)
   Col William R. Brewster

- 11th Massachusetts

- 70th New York

- 71st New York

- 72nd New York

- 73rd New York

- 74th New York

- 120th New York

- 84th Pennsylvania

Provisional Brigade
   Col John Ramsey

- 8th New Jersey

- rest unknown

12th New York Battalion

First Division
     BG Charles Griffin

1st Brigade
   BG Romeyn B. Ayres

- 140th New York

- 146th New York

- 91st Pennsylvania

- 155th Pennsylvania

- 2nd United States, Companies B, C, F, H, I, and K

- 11th United States, Companies B, C, D, E, F, and G, 1st Battalion

- 12th United States, Companies A, B, C, D, and G, 1st Battalion

- 12th United States, Companies A, C, D, F, and H, 2nd Battalion

- 14th United States, 1st Battalion

- 17th United States, Companies A, C, D, G, and H, 1st Battalion

- 17th United States, Companies A, B, and C, 2nd Battalion

2nd Brigade
   Col Jacob B. Sweitzer

- 9th Massachusetts

- 22nd Massachusetts

- 32nd Massachusetts

- 4th Michigan

- 62nd Pennsylvania

3rd Brigade
   BG Joseph J. Bartlett

- 20th Maine

- 1st Michigan

- 18th Massachusetts

- 16th Michigan

- 44th New York

- 83rd Pennsylvania

- 118th Pennsylvania

Second Division
     BG John C. Robinson (w)
     Division disbanded May 9. 1st Brigade became 4th Brigade, Fourth Division, 2nd Brigade became 2nd Brigade, Third Division, and 3rd Brigade reported directly to Warren.

1st Brigade
   Col Peter Lyle

- 16th Maine

- 13th Massachusetts

- 39th Massachusetts

- 104th New York

- 90th Pennsylvania

2nd Brigade
   Col Richard Coulter (w)
   Col James L. Bates

- 12th Massachusetts

- 83rd New York

- 97th New York

- 11th Pennsylvania

- 88th Pennsylvania

3rd Brigade
   Col Andrew W. Denison (w)
   Col Charles E. Phelps (c)
   Col Richard N. Bowerman

- 1st Maryland

- 4th Maryland

- 7th Maryland

- 8th Maryland

Third Division
     BG Samuel W. Crawford

1st Brigade
   Col William McCandless (w)
   Col William C. Talley (c)
   Col Wellington H. Ent

- 1st Pennsylvania Reserves

- 2nd Pennsylvania Reserves

- 6th Pennsylvania Reserves

- 7th Pennsylvania Reserves

- 11th Pennsylvania Reserves

- 13th Pennsylvania Reserves

3rd Brigade
   Col Joseph W. Fisher

- 5th Pennsylvania Reserves

- 8th Pennsylvania Reserves

- 10th Pennsylvania Reserves

- 12th Pennsylvania Reserves

Fourth Division
     BG Lysander Cutler

1st Brigade
   Col William W. Robinson

- 7th Indiana

- 19th Indiana

- 24th Michigan

- 1st New York Battalion Sharpshooters

- 2nd Wisconsin

- 6th Wisconsin

- 7th Wisconsin

2nd Brigade
   BG James C. Rice (k)
   Col Edward B. Fowler

- 76th New York

- 84th New York

- 95th New York

- 147th New York

- 56th Pennsylvania

3rd Brigade
   Col Edward S. Bragg

- 121st Pennsylvania

- 142nd Pennsylvania

- 143rd Pennsylvania

- 149th Pennsylvania

- 150th Pennsylvania

Heavy Artillery Brigade

- 6th New York Heavy Artillery

- 15th New York Heavy Artillery (1st and 3rd Battalion)

- 4th New York Heavy Artillery (2nd Battalion)

- Battery C, 3rd Massachusetts Light

- Battery E, 5th Massachusetts Light

- Battery D, 1st New York Light

- Batteries E and L, 1st New York Light

- Battery H, 1st New York Light

- 2nd Battalion, 4th New York Heavy

- Battery B, 1st Pennsylvania Light

- Battery B, 4th United States

- Battery D, 5th United States

- Assigned from the Artillery Reserve on May 16

- 9th Battery, Massachusetts Light

- Battery B, 1st New York Light

- Battery C, 1st New York Light

- 5th Battery, New York Light (sent to Washington, D.C. May 19)

- 15th Battery, New York Light

VI Corps - MG John Sedgwick (k) - BG Horatio Wright

8th Pennsylvania Cavalry, Company A

First Division
     BG Haratio G. Wright
     BG David A. Russell

1st Brigade (First New Jersey Brigade)
   Col Henry W. Brown

- 1st New Jersey

- 2nd New Jersey

- 3rd New Jersey

- 4th New Jersey

- 10th New Jersey

- 15th New Jersey

2nd Brigade
   Col Emory Upton

- 5th Maine

- 121st New York

- 95th Pennsylvania

- 96th Pennsylvania

- 2nd Connecticut Heavy Artillery

3rd Brigade
   BG David A. Russell
   BG Henry L. Eustis

- 6th Maine

- 49th Pennsylvania

- 119th Pennsylvania

- 5th Wisconsin

4th Brigade
   Col Nelson Cross

- 65th New York

- 67th New York

- 122nd New York

- 82nd Pennsylvania

Second Division
     BG Thomas H. Neill

1st Brigade
   BG Frank Wheaton

2nd Brigade (1st Vermont Brigade)
   Col Lewis A. Grant

- 1st Vermont Heavy Artillery

- 2nd Vermont

- 3rd Vermont

- 4th Vermont

- 5th Vermont

- 6th Vermont

3rd Brigade
   Col Daniel D. Bidwell

- 7th Maine

- 43rd New York

- 49th New York

- 77th New York

- 61st Pennsylvania

4th Brigade
   BG Henry L. Eustis
   Col Oliver Edwards

- 7th Massachusetts

- 10th Massachusetts

- 37th Massachusetts

- 2nd Rhode Island

Third Division
     BG James B. Ricketts

1st Brigade
   BG William H. Morris (w)
   Col John W. Schall
   Col William S. Truex

- 14th New Jersey

- 106th New York

- 151st New York

- 87th Pennsylvania

- 10th Vermont

2nd Brigade
   Col Benjamin F. Smith

- 6th Maryland

- 110th Ohio

- 122nd Ohio

- 126th Ohio

- 67th Pennsylvania

- 138th Pennsylvania

Artillery Brigade
   Col Charles H. Tompkins

Cavalry Corps - MG Philip H. Sheridan

6th United States

First Division
     BG Wesley Merritt

1st Brigade (the Michigan Brigade)
   BG George A. Custer

- 1st Michigan

- 5th Michigan

- 6th Michigan

- 7th Michigan

2nd Brigade
   Col Thomas C. Devin

- 4th New York

- 6th New York

- 9th New York

- 17th New York

Reserve Brigade
   Col Alfred Gibbs

- 19th New York

- 6th Pennsylvania

- 1st United States

- 2nd United States

- 5th United States

Second Division
     BG David McM. Gregg

1st Brigade
   BG Henry E. Davies, Jr.

- 1st Massachusetts

- 1st New Jersey

- 6th Ohio

- 1st Pennsylvania

2nd Brigade
   Col John Irvin Gregg

- 1st Maine

- 10th New York

- 2nd Pennsylvania

- 4th Pennsylvania

- 8th Pennsylvania

- 16th Pennsylvania

Third Division
     BG James H. Wilson

1st Brigade
   Col John B. McIntosh

- 1st Connecticut

- 2nd New York

- 5th New York

- 18th Pennsylvania

2nd Brigade
   Col George H. Chapman

- 3rd Indiana

- 8th New York

- 1st Vermont

Horse Artillery

1st Brigade
   Cpt James M. Robertson

- 6th New York Battery

- Batteries B and L, 2nd United States

- Battery D, 2nd United States

- Battery M, 2nd United States

- Battery A, 4th United States

- Batteries C and E, 4th United States

2nd Brigade
   Cpt Dunbar R. Ransom

- Batteries E and G, 1st United States

- Batteries H and I, 1st United States

- Battery K, 1st United States

- Battery A, 2nd United States