DEFENSES NORTH OF THE POTOMAC*
Lieutenant Col Joseph A. Haskin.
Col Augustus A. Gibson.
2nd Pennsylvania Heavy Artillery, Col Augustus A. Gibson. 1st Vermont Heavy Artillery, Colonel James M. Warner.
Col Lewis O. Morris.
1st Maine Heavy Artillery, Col Daniel Chaplin. 7th New York Heavy Artillery, Col Lewis O. Morris. 9th New York Heavy Artillery, Col Joseph Welling. 9th New York Battery, Captain Emil Schubert.
10th New York Heavy Artillery, Col Alexander Piper.
DEFENSES SOUTH OF THE POTOMAC. +
Brigadier General Gustavus A. De Russy.
Col Thomas R. Tannatt.
1st Massachusetts Heavy Artillery (eight companies), Colonel thomas R. Tannatt. 2nd New York Heavy Artillery, Colonel Joseph N. G. Whistler. 5th New York Heavy Artillery (3rd Battalion), Marj. Gustavus F. Merriam.
Col Nehry L. Abbot.
1st Connecticut Heavy Artillery, Colonel Henry L. Abbot. 1st Rhode Island Light Artillery, Battery H, Captain Jeffrey Hayard. Wisconsin Heavy Artillery (one company), Captain Charles C. Meservey.
Col Leverette W. Wessells.
2nd Connecticut Heavy Artillery, Colonel Leverette W. Wessells. 3rd New York Heavy Artillery Battalion (eight companies), Lieutenant Col Louis Schirmer.
Col Henry H. Hall.
4th New York Heavy Artillery (eight companies), Colonel Henry H. Hall. Union Battalion (five companies), ++Lieutenant Nathaniel Messer. 11th New York Cavalry (one company), Lieutenant Henry C. Bates. Cavalry detachment, $Lieutenant Stewart Hunter.
*Headquarters of Defenses and Third Brigade in Washington; First Brigade at Forts Bunker Hill and Slocum; Second Brigade at Advance Battery and Forts Reno, Simmnons, and Sumner.
+ Headquarters, Arlington; First Brigade at Forts Albany, Bennett, Cass, Corcoran, Craig, De Kalb, Haggerty, C. F. Smith, Tillinghast, Whipple, and Woodruff: Second Brigade, Forts Ellsworth and Lyon, and Redoubts A, B. C, and D; Third Brigade, Battery Gareshe, and Forts Barnard, Blenkre, Richardson, Scott, Ward, and Worth; Fourth Brigade, Battery Martin Scott and Forts Ethan Allen and Marccy.
++ Detachments from Camp Convalescent.
$ From 2nd and 13th New York, and 12th Illinois Cavalry.