MGen Fitz John Porter

Escort: Detachment, 1st Maine Cavalry, Capt George J. Summat

FIRST DIVISION
MGen George W. Morell

First Brigade
Col James Barnes
2nd Maine, Col Charles W. Roberts
18th Massachusetts, LtCol Joseph Hayes
22nd Massachusetts, LtCol William S. Tilton
1st Michigan, Capt. Emory W. Belton
13th New York, Col Elisha G. Marshall
25th New York, Col Charles A. Johnson
118th Pennsylvania, Col Charles M. Prevost
2nd Company York Massachusetts Sharpshooters, Capt Lewis E. Wentworth

Second Brigade
BGen Charles Griffin
2nd D.C., Col Charles M. Alexander
9th Massachusetts, Col Patrick R. Guiney
32nd Massachusetts, Col Francis J. Parker
4th Michigan, Col Jonathan W. Childs
14th New York, Cal. James McQuade
62nd Pennsylvania, Col Jacob B. Sweitzer

Third Brigade
Col T. B. W. Stockton
20th Maine, Col Adelbert Ames
16th Michigan, LtCol Norval E.Welch
12th New York, Capt William Huson
17th New York, LtCol Nelson B. Bartram
44th New York, Maj Freeman Conner
83rd Pennsylvania, Capt Orpheus S. Woodward
Brady's Company, Michigan Sharpshooters, Lt Jonas H.Titus Jr.

Artillery
3rd Massachusetts, Capt Augustus P. Martin
C, 1st Rhode Island, Capt Richard Waterman
D, 5th U.S., Lt Charles E. Hazlett
 

SECOND DIVISION
BGen George Sykes

First Brigade
LtCol Robert C. Buchanan
3rd U.S., Capt John D. Wilkins
4th U.S., Capt Hiram Dryer
12th U.S. (1st Battalion), Capt Matthew M. Blunt
12th U.S. (2nd Battalion), Capt Thomas M. Anderson
14th U.S. (1st Battalion), Capt W. Harvey Brown
14th U.S. (2nd Battalion), Capt David B. McKibbin

Second Brigade
Maj Charles S. Lovell
1st and 6th U.S., Capt Levi C. Bootes
2nd and 10th U.S., Capt. John S. Poland
11th U.S., Capt DeLancey Floyd-Jones
17th U.S., Maj George L. Andrews

Third Brigade
Col Gouverneur K. Warren
5th New York, Capt Cleveland Winslow
10th New York, LCol John W. Marshall

Artillery
E and G, 1st U.S., Lt Alanson M. Randol
I, 5th U.S., Capt Stephen H. Weed
K, 5th U.S., Lt William E. Van Reed
 

THIRD DIVISION
(reached the field of Antietam Sept.18th)
BGen Andrew A. Humphreys

First Brigade
BGen Erastus B. Tyler
91st Pennsylvania, Col Edgar M. Gregory
126th Pennsylvania, Col. James G. Elder
129th Pennsylvania, Col Jacob G. Frick
134th Pennsylvania, Col Matthew S.Quay

Second Brigade
Col Peter H. Allabach
123rd Pennsylvania., Col John B.Clark
131st Pennsylvania, LtCol William B. Shaut
133rd Pennsylvania, Col Franklin B. Speakman
155th Pennsylvania, Col Edward J. Allen

Artillery
C, 1st New York, Capt Almont Barnes
L, 1st Ohio, Capt. Lucius N. Robinson

ARTILLERY RESERVE
LtCol William Hays
A, 1st Battalion New York, Lt Bernhard Wever
B, 1st Battalion New York, Lt Alfred von Kleiser
C, 1st Battalion New York, Capt Robert Langner
D, 1st Battalion New York, Capt Charles Kusserow
5th New York, Capt Elijah D. Taft
K, 1st U. S., Capt William M. Graham
G, 4th U. S., Lt Marcus P. Miller

Lt = Lietutenant
Capt = Captain
Maj = Major
LtCol = Lieutenant Colonel
Col = Colonel
BGen = Brigadier General
MGen = Major General

(w) = wounded
(mw) = mortally wounded
(k) = killed
(c) = captured
Unless otherwise noted, casualities occured on September 17th.