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Guards & Orderlies
McClellan Dragoons (Illinois)
Sturgis (Illinois) Rifles
Oneida (New York) Cavalry Company
1st United States Cavalry, Cos. BCH&I from Cavalry Reserve, 2nd Brig.
4th United States Cavalry, Cos. A & E
Provost Guard Colonel Andrew Porter
93rd New York Infantry, Cos. AFH&K Lt. Colonel Benjamin C. Butler
8th United States Infantry, Cos. F&G
19th United States Infantry Cos. G&H Captain Edmund L. Smith (Co. G)
Captain Henry S. Welton (Co. H)
from Indianapolis
2nd United States Cavalry Regiment
Engineer Brigade
15th New York Engineer Regiment
50th New York Engineer Regiment
Regular Engineer Battalion
Siege Artillery
1st Connecticut Heavy Artillery to Defences Washington