Organization and Service
Organized at Brattleboro and mustered in as 11th Vermont Infantry September 1, 1862. Left State for Washington, District of Columbia, September 7, 1862. Designation of Regiment changed to 1st Heavy Artillery December 10, 1862. (Co. "L" organized July 11, 1863, and Co. "M" October 7, 1863.) Attached to 1st Brigade, Haskins' Division, Military District of Washington, to February, 1863. 1st Brigade, Haskins' Division, 22nd Army Corps, Defenses of Washington, to May, 1864. 2nd Brigade, 2nd Division, 6th Army Corps, Army of the Potomac, and Army of the Shenandoah, Middle Military Division, to June, 1865. Middle Department, 8th Corps, to August, 1865.
SERVICE.--Duty in the Defenses of Washington, DC, north of the Potomac Sep., 1862, to May, 1864. Company "A" at Fort Lincoln Sep. 27 to Nov. 17, 1862, then at Fort Totten until Mar., 1864, and at Fort Lincoln until May, 1864. Company "B" at Forts Massachusetts and Stevens until Mar., 1864, then at Fort Totten until May, 1864. Companies "C" and "D" at Fort Saratoga until Nov. 17, 1862, then at Fort Massachusetts until Mar., 1864. Company "C" at Fort Stevens until May, 1864. Company "D" at Fort Saratoga until May, 1864. Company "E" at Fort Totten until Nov. 17, 1862, then at Fort Slocum until May, 1864. Company "F" at Fort Bunker Hill until Nov. 17, 1862, then at Fort Slocum until Mar., 1864, and at Fort Thayer until May, 1864. Company "G" at Fort Lincoln until Nov. 17, 1862, then at Fort Slocum until May, 1864. Company "H" at Fort Slocum until Mar., 1864, then at Fort Bunker Hill until May, 1864. Company "I" at Fort Thayer until Nov. 17, 1862, then at Fort Massachusetts until Mar., 1864, and at Fort Bunker Hill until May, 1864. Company "K" at Fort Totten until May, 1864. Company "L" at Fort Lincoln until May, 1864. Company "M" at Fort Bunker Hill until May, 1864. Ordered to Join army in the field May 12, 1864. Moved to Belle Plains, VA, and join 6th Army Corps at Spotsylvania C.H., VA, May 15. Spotsylvania C.H. May 15-21. North Anna River May 23-26. Line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor Jun. 1-12. Before Petersburg Jun. 17-Jul. 9. Jerusalem Plank Road Jun. 22-23. Moved to Washington, DC, Jul. 9-11. Repulse of Early's attack on Fort Stevens Jul. 11-12. Snicker's Gap Expedition Jul. 15-23. Sheridan's Shenandoah Valley Campaign Aug. 7-Nov. 28. Near Charlestown Aug. 21-22. Gilbert's Ford, Opequan, Sep. 13. Battle of Opequan, Winchester, Sep. 19. Fisher's Hill Sep. 22. Battle of Cedar Creek Oct. 19. Duty at Strasburg until Nov. 9, and at Kernstown until Dec. 9. Moved to Petersburg, VA, Dec. 9-12. Siege of Petersburg Dec. 13, 1864, to Apr. 2, 1865. Fort Fisher, Petersburg, Mar. 25, 1865. Appomattox Campaign Mar. 28-Apr. 9. Assault on and fall of Petersburg Apr. 2. Pursuit of Lee. Duty at Burkesville until Apr. 23. Mar. to Danville Apr. 23-27, and duty there until May 18. At Manchester May 19-24, and at Munson's Hill, Washington, until Jun. 24. Corps Review Jun. 8. Old members mustered out Jun. 24, 1865. Veterans and Recruits consolidated to a Battalion of four Companies, and duty at Fort Foote, MD, Defenses of Washington, until Aug. Mustered out Aug. 25, 1865.
Regiment lost during service: 152 men killed and mortally wounded, 2 died from accidents, 175 died in Confederate prisons and 210 died from disease. Total 539.
Source: Frederick H. Dyer, A compendium of the War of the Rebellion: compiled and arranged from official records of the federal and Confederate armies, reports of the adjutant generals of the several states, the army registers, and other reliable documents and sources, (Dyer Pub. Co., Des Moines, IA, 1908), Part 3, pp. 1647-1654.