DEPARTMENT OF NORTH-EASTERN VIRGINIA (Brig. Gen. I. McDowell, U.S.A.)

• RIGHT FLANK

  • FIRST DIVISION (Brig. Gen. D. Tyler, Connecticut Volunteers)

    • FIRST BRIGADE (Col. E. D. Keyes, 11th U.S. Infantry)
      [10] 1st Connecticut (Lt. Col. J. Speidel)
      [10] 2nd Connecticut (Col. A. H. Terry)
      [10] 3rd Connecticut (Col. J. L. Chatfield)
      [10] 2nd Maine (Col. C. D. Jameson)
      
    • SECOND BRIGADE (Brig. Gen. R. C. Schenck, U.S.V.)
      [10] 82nd New York (Col. G. W. B. Tompkins)
      [10] 1st Ohio (Col. A. M. McCook)
      [10] 2nd Ohio (Lt. Col. R. Mason)
      [1] E, 2nd U.S. Artillery (Capt. J. H. Carlisle) (2x 13 J, 2x 6 G)
      
    • THIRD BRIGADE (Col. W. T. Sherman, 13th U.S. Infantry)
      [10] 13th New York (Col. I. F. Quinby)
      [10] 69th New York (Col. M. Corcoran)
      [10] 79th New York (Col. J. Cameron)
      [10] 2nd Wisconsin (Lt. Col. H. W. Peck)
      [1] E, 3rd U.S. Artillery (Capt. R. B. Ayres) (2x 10 P, 2x 6 G, 2x 12 H)
      [-] Section, G, 1st U.S. Artillery (Lt. J. Edwards) (1x 30 P)
      
  • SECOND DIVISION (Col. D. Hunter, 3rd U.S. Cavalry)

    • FIRST BRIGADE (Col. A. Porter, 16th U.S. Infantry)
      [10] 8th New York State Militia (Col. G. Lyons)
      [10] 27th Now York (Col. H. W. Slocum)
      [10] 84th New York (Col. A. M. Wood)
      [8] Battalion U.S. Infantry (Maj. G. Sykes) [#1]
      [8 ?] Battalion U.S. Marines (Maj. J. G. Reynolds)
      [7] Battalion U.S. Cavalry (Maj. I. N. Palmer) [#2]
      [1] D, 5th U.S. Artillery (Capt. C. Griffin) (4x 10 P, 2x 12 H)
      
    • SECOND BRIGADE (Col. A. E. Burnside, 1st Rhode Island)
      [10] 2nd New Hampshire (Col. G. Marston)
      [10] 71st New York State Militia (Col. H. P. Martin)
      [-] Artillery, 71st New York State Militia (?) (2x 12 D) [#3]
      [10] 1st Rhode Island (Maj. J. P. Balch)
      [10] 2nd Rhode Island (Col. J. S. Slocum)
      [1] A, 1st Rhode Island Light Artillery (?) (6x 13 J)
      
  • THIRD DIVISION (Col. S. P. Heintzelman, 17th U.S. Infantry)

    • FIRST BRIGADE (Col. W. B. Franklin, 12th U.S. Infantry)
      [10] 5th Massachusetts (Col. S. C. Lawrence)
      [10] 11th Massachusetts (Col. G. Clark, Jr.)
      [10] 1st Minnesota (Col. W. A. Gorman)
      [1] I, 1st U.S. Artillery (Capt. J. B. Ricketts (6x 10 P)
      
    • SECOND BRIGADE (Col. O. B. Wilcox, 1st Michigan)
      [10] 1st Michigan (Maj. A. F. Bidwell)
      [10] 4th Michigan (Col. D. A. Woodbury)
      [10] 11th New York (Lt. Col. N. L. Farnham)
      [10] 38th New York (Col. J. H. H. Ward)
      [1] D, 2nd U.S. Artillery (Capt. R. Arnold) (2x 13 J, 2x 6 G)
      
    • THIRD BRIGADE (Col. O. O. Howard, 3rd Maine)
      [10] 3rd Maine (Maj. H. G. Staples)
      [10] 4th Maine (Col. H. G. Berry)
      [10] 5th Maine (Col. M. H. Dunnell)
      [10] 2nd Vermont (Col. H. Whiting)
      
• LEFT FLANK

  • Detached from First Division

    • FOURTH BRIGADE (Col. I. B. Richardson, 2nd Michigan)
      [10] 1st Massachusetts (Col. R. Codwin)
      [10] 2nd Michigan (Maj. A. W. Williams)
      [10] 3rd Michigan (Col. D. McConnell)
      [10] 12th New York (Col. E. L. Walrath)
      [-] Section, G, 1st U.S. Artillery (Lt. J. Edwards) (2x 20 P)
      [1] M, 2nd U.S. Artillery (Capt. H. J. Hunt) (4x 12 N)
      
• RESERVE (AT CENTREVILLE)

  • FIFTH DIVISION (Col. D. S. Miles, 2nd U.S. Infantry)

    • FIRST BRIGADE (Col. L. Blenker, 8th New York)
      [10] 8th New York (Lt. Col. J. Stahel)
      [10] 29th New York (Col. A. von Steinwehr)
      [10] 39th New York (Col. F. G. D'Utassy)
      [10] 27th Pennsylvania (Col. M. Einstein)
      [1] A, 2nd U.S. Artillery (Capt. J. C. Tidball (2x 6 G, 2x 12 H)
      [1] Provisional New York Battery (Capt. C. Bookwood) (6x 6 G) [#4]
      
    • SECOND BRIGADE (Col. T. A. Davies, 16th New York)
      [10] 16th New York (Lt. Col. S. Marsh)
      [10] 18th New York (Col. W. A. Jackson)
      [10] 31st New York (Col. C. E. Pratt)
      [10] 32nd New York (Col. R. Matheson)
      [1] G, 2nd U.S. Artillery (Lieut. O. D. Greene) (4x 10 P)
      

[#1] C-K, 2nd U.S. Infantry; B-D-G-H-K, 3rd U.S. Infantry; G, 8th U.S. Infantry.

[#2] K, 2nd U.S. Dragoons; A-E, 1st U.S. Cavalry; B-E-G-I, 2nd U.S. Cavalry.

[#3] Manned by the regiment infantrymen.

[#4] Guns of Varian's battery (a N.Y.S.M. unit mustered out on the eve of battle) manned by infantrymen of 29th N.Y.

30 P = 30-pdr Parrott, 4.20", rifled

20 P = 20-pdr Parrott, 3.67", rifled

13 J = 13-pdr James, 3.80", rifled

12 N = 12-pdr Light Field Gun (Napoleon), 4.62", smoothbore

12 H = 12-pdr Field Howitzer, 4.62", smoothbore

12 D = 12-pdr Dahlgren Boat Howitzer, 4.62", smoothbore

10 P = 10-pdr Parrott, 2.91", rifled

6 G = 6-pdr Field Gun, 3.67", smoothbore