U.S. Army

Army of the Potomac

Headquarters

Provost Guard - Brevet Brigadier General George N. Macy

1st Massachusetts Cavalry, Company C - Captain Edward A. Flint

Independent Brigade - Brevet Brigadier General Charles H. T. Collis

1st Massachusetts Cavalry (8 Companies) = Major John Tewksbury

61st Massachusetts Infantry - Colonel Charles F. Walcott

Second Corps

First Division

2nd Brigade - Colonel Robert Nugent

28th Massachusetts Infantry (5 Companies) - Captain Patrick H. Bird

Second Division

1st Brigade - Colonel William A. Olmsted

19th Massachusetts Infantry - Captain Charles S. Palmer

20th Massachusetts Infantry - Lieutenant Colonel Arthur R. Curtis

Third Division

2nd Brigade - Brigadier General Byron R. Pierce

1st Massachusetts Heavy Artillery - Major Nathaniel Shatswell

3rd Brigade - Brevet Brigadier General Robert McAllister

11th Massachusetts Infantry - Lieutenant Colonel Charles C. Rivers

Artillery Brigade - Lieutenant Colonel John G. Hazzard

10th Battery, Massachusetts Light Artillery - Captain Joshua Webb Adams

Fifth Corps

First Division

3rd Brigade - Brevet Major General Joseph Bartlett (^, April 1), Brevet Brigadier General Alfred L. Pearson

32nd Massachusetts Infantry - Lieutenant Colonel James A. Cunningham

Third Division

2nd Brigade - Brigadier General Henry Baxter

39th Massachusetts Infantry - Lieutenant Colonel Henry M. Tremlett (w, March 31), Captain Joseph J. Cooper

Sixth Corps

First Division

3rd Brigade - Colonel Oliver Edwards

37th Massachusetts Infantry - Captain Archibald Hopkins

Ninth Corps

First Division

3rd Brigade - Colonel James Bintliff

29th Massachusetts Infantry - Captain John M. Deane

57th Massachusetts Infantry - Captain Albert W. Cook

59th Massachusetts Infantry - Major Ezra P. Gould

Second Division

1st Brigade - Brevet Brigadier General John I. Curtin

35th Massachusetts Infantry - Colonel Sumner Carruth

36th Massachusetts Infantry - Lieutenant Colonel Thaddeus L. Barker

58th Massachusetts Infantry - Lieutenant Colonel John C. Whiton

2nd Brigade - Brigadier General Simon Goodell Griffin

56th Massachusetts Infantry - Major Zabdiel B. Adams, Colonel Stephen M. Weld, Jr. (in command April 4)

Artillery Brigade - Brevet Brigadier General John C. Tidball

5th Battery, Massachusetts Light Artillery - Major Charles A. Phillips

9th Battery, Massachusetts Light Artillery - Captain Richard S. Milton

11th Battery, Massachusetts Light Artillery - Captain Edward J. Jones

14th Battery, Massachusetts Light Artillery - Captain Joseph W. B. Wright

Army of the James

Headquarters

Pontoniers

3rd Massachusetts Heavy Artillery, Company I - Captain John Pickering, Jr.

Cavalry

4th Massachusetts Cavalry (Companies I, L & M) - Colonel Francis Washburn (mw, April 6)

5th Massachusetts Cavalry (Colored) - Colonel Charles F. Adams, Jr.

Twenty-Fourth Corps

Headquarters Guard - Captain Charles E. Thomas

4th Massachusetts Cavalry, Company F - Captain Joseph J. Baker

4th Massachusetts Cavalry, Company K - Captain Charles E. Thomas

First Division

3rd Brigade - Colonel George B. Dandy

24th Massachusetts Infantry - Captain Thomas F. Edmands

Detached at Bermuda Hundred

Third Division

3rd Brigade - Colonel Samuel H. Roberts

40th Massachusetts Infantry - Lieutenant Colonel John Pollack

Independent Division

1st Brigade - Lieutenant Colonel Andrew Potter

34th Massachusetts Infantry - Captain Frank T. Leach

Twenty-Fifth Corps

Provost Guard - Major Atherton H. Stevens, Jr.

4th Massachusetts Cavalry, Company E & H - Major Atherton H. Stevens, Jr.

Army of the Shenandoah

Cavalry Corps

First Division

3rd Brigade - Brigadier General Alfred Gibbs

2nd Massachusetts Cavalry - Colonel Caspar Crowninshield