Army of the Potomac
Maj. Gen. Joseph Hooker
General Staff
Chief of Staff
Maj. Gen. Daniel Butterfield
Assistant Adjutant General
Brig. Gen. Seth Williams
Chief Quartermaster
Brig. Gen. Rufus Ingalls
Chief of Engineers
Brig. Gen. Gouverneur K. Warren
Bureau of Military Information
Col. George H. Sharpe
Medical Director
Maj. Jonathan Letterman
General Headquarters
Command of the Provost Marshall
Brig. Gen. Marsena R. Patrick
93rd New York Infantry
Col. John S. Crocker
8th U.S. Companies A, B, C, D, F, and G
Capt. Edwin W. H. Read
6th Pennsylvania Cavalry Companies E and I
Capt. James Starr
Detachment Regular Cavalry
Lieut. Tattnall Paulding
Patrick's Brigade
Col. William F. Rogers
21st New York Infantry
Lieut. Col. Chester W. Steinberg
23rd New York Infantry
Col. Henry C. Hoffman
35th New York Infantry
Col. John G. Todd
80th New York (20th Militia)
Col. Theodore B. Gates
Maryland Light Artillery, Battery B
Capt. Alonzo Snow
Ohio Light Artillery, 12th Battery
Capt. Aaron C. Johnson
Engineer Brigade
Brig. Gen. Henry W. Benham
15th New York Engineer
Col. Clinton G. Colgate
50th New York Engineer
Col. Charles B. Stuart
United States Engineer Battalion
Capt. Chauncey B. Reese
Signal Corps
Capt. Samuel T. Cushing
Ordnance Detachment
Lieut. John R. Edie, Jr.
Guards and Orderlies
Oneida (New York) Cavalry
Capt. Daniel P. Mann