Organized at Brattleboro and mustered in as 11th Vermont Infantry September 1, 1862. Left State for Washington, D.C., 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, D.C., north of the Potomac September, 1862, to May, 1864. Company A at Fort Lincoln September 27 to November 17, 1862, then at Fort Totten until March, 1864, and at Fort Lincoln until May, 1864. Company B at Forts Massachusetts and Stevens until March, 1864, then at Fort Totten until May, 1864. Companies C and D at Fort Saratoga until November 17, 1862, then at Fort Massachusetts until March, 1864. Company C at Fort Stevens until May, 1864. Company D at Fort Saratoga until May, 1864. Company E at Fort Totten until November 17, 1862, then at Fort Slocum until May, 1864. Company F at Fort Bunker Hill until November 17, 1862, then at Fort Slocum until March, 1864, and at Fort Thayer until May, 1864. Company G at Fort Lincoln until November 17, 1862, then at Fort Slocum until May, 1864. Company H at Fort Slocum until March, 1864, then at Fort Bunker Hill until May, 1864. Company I at Fort Thayer until November 17, 1862, then at Fort Massachusetts until March, 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 Court House, Va., May 15. Spotsylvania Court House May 15-21. North Anna River May 23-26. Line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Before Petersburg June 17-July 9. Jerusalem Plank Road June 22-23. Moved to Washington, D.C., July 9-11. Repulse of Early's attack on Fort Stevens July 11-12. Snicker's Gap Expedition July 15-23. Sheridan's Shenandoah Valley Campaign August 7-November 28. Near Charlestown August 21-22. Gilbert's Ford, Opequan, September 13. Battle of Opequan, Winchester, September 19. Fisher's Hill September 22. Battle of Cedar Creek October 19. Duty at Strasburg until November 9, and at Kernstown until December 9. Moved to Petersburg, Va., December 9-12. Siege of Petersburg December 13, 1864, to April 2, 1865. Fort Fisher, Petersburg, March 25, 1865. Appomattox Campaign March 28-April 9. Assault on and fall of Petersburg April 2. Pursuit of Lee. Duty at Burkesville until April 23. March to Danville April 23-27, and duty there until May 18. At Manchester May 19-24, and at Munson's Hill, Washington, until June 24. Corps Review June 8. Old members mustered out June 24, 1865. Veterans and Recruits consolidated to a Battalion of four Companies, and duty at Fort Foote, Md., Defenses of Washington, until August. Mustered out August 25, 1865.

Regiment lost during service 10 Officers and 154 Enlisted men killed and mortally wounded and 2 Officers and 410 Enlisted men by disease. Total 576.

1st Independent Company,
Vermont Volunteer Heavy Artillery

Organized April, 1865, from surplus Recruits of 2nd Independent Battery, Vermont Volunteer Light Artillery. Duty at Port Hudson, La., until July, 1865. Moved to Vermont July 7-20, and mustered out July 25, 1865.

1st Independent Battery,
Vermont Volunteer Light Artillery

Organized at Brattleboro and mustered in February 18, 1862. Left State for New York City March 6. Sailed on Steamer "Wallace" for Ship Island March 10, arriving April 5. Attached to Phelps' 1st Brigade, Dept. of the Gulf, to December, 1862, Artillery, 2nd Division, 19th Army Corps, Dept. of the Gulf, to June, 1863. Artillery, 3rd Division, 19th Army Corps, to September, 1863. Artillery, District of LaFourche, Dept. of the Gulf, to January, 1864. Artillery, 2nd Division, 19th Army Corps, Army of the Gulf, to July, 1864. Artillery, 1st Division, 19th Army Corps, to August, 1864.

SERVICE.--Duty at Ship Island until May 16, 1863. Moved to Camp Parapet, Defenses of New Orleans, La., May 16, and duty there until January 17, 1863. (Center Section at Fort Pike May 6 to June 4, 1862.) Duty at New Orleans until May 19, 1863. Expedition to Lake Pontchatrain April 18-21. Moved to Baton Rouge, La., May 19. Advance on Port Hudson, La., May 21-24. Siege of Port Hudson May 24-July 9. Surrender of Port Hudson July 9. March to Baton Rouge July 11-12. Return to Port Hudson July 23, and duty there until September 1. Ordered to New Orleans, La., September 1. Sabine Pass, Texas Expedition, September 3-11. Moved to Brashear City, thence to Berwick City and to Fort Bisland September 16-23. Return to Brashear City September 28, and duty there until March 3, 1864. Moved to Franklin March 3. Red River Campaign March 10-May 22. Advance from Franklin to Alexandria March 14-26. Battle of Sabine Cross Roads April 8. Pleasant Hill April 9. Monett's Bluff, Cane River Crossing, April 23. Alexandria April 30-May 10. Retreat to Morganza May 13-20. Mansura May 16. Yellow Bayou May 18. Duty at Morganza until July. Moved to Baton Rouge July 3. thence ordered home July 28. Mustered out August 10, 1864. Recruits transferred to 2nd Independent Battery, Vermont Volunteer Light Artillery.

Battery lost during service 3 Enlisted men killed and mortally wounded and 51 Enlisted men by disease. Total 54.

2nd Independent Battery,
Vermont Volunteer Light Artillery

Organized at Brandon and mustered in December 24, 1861. Moved to Lowell, Mass., December 24; thence to Boston February 4, 1862. Embark on Steamer "Idaho" for Ship Island, La., February 6, arriving there March 8. Attached to Phelps' 1st Brigade, Dept. of the Gulf, to December, 1862. Artillery, 3rd Division, 19th Army Corps, Array of the Gulf, to August, 1863. Garrison Artillery, Port Hudson, La., to July, 1865.

SERVICE.--Operations against New Orleans, La., April 11-May 2, 1862. Occupation of New Orleans May 2 (the first Union Battery to enter the city). Duty in New Orleans until May 31, and at Camp Parapet until October 31. Expedition to Pass Manchac July 25-August 2. Duty at New Orleans October 31 to December 26. Expedition to Galveston, Texas, December 26, 1862, to January 3, 1863. Action at Galveston January 1, 1863. Duty at New Orleans until March. Expedition to Port Hudson, La., March 7-20. At Baton Rouge until May. Advance on Port Hudson May 18-24. Action at Plain's Store May 21. Siege of Port Hudson May 24-July 9. Assaults on Port Hudson May 27 and June 14 Surrender of Port Hudson July 9. Jackson, La., August 3. Garrison and guard duty at Port Hudson until July, 1865. Expedition to Clinton July 28, 1864. Non-Veterans mustered out September 30, 1864. Battery moved to Vermont July 7-20, 1865, and mustered out July 31, 1865.

Losses during service 1 Enlisted man killed and 53 Enlisted men by disease. Total 54.

3rd Independent Battery,
Vermont Volunteer Light Artillery

Organized at Burlington and mustered in January 1, 1864. Moved to Washington, D.C., January 15-18, and duty at Camp Barry until April 5. Attached to Artillery, 4th Division, 9th Army Corps, Army of the Potomac, to July, 1864. Reserve Artillery, 2nd Army Corps, Army of the Potomac, to September, 1864. Reserve Artillery, 6th Army Corps, and Artillery Reserve, Army of the Potomac, to June, 1865.

SERVICE.--Rapidan (Va.) Campaign May-June, 1864. Guard trains of the Army of the Potomac through the Wilderness and to Petersburg, Va. Siege of Petersburg June 16, 1864, to April 2, 1865. Garrison Fort Morton June 20 to August 19, 1864. Mine Explosion, Petersburg, July 30. Weldon Railroad August 18-21. At Aiken House August 27-30. At Fort Sedgwick until September 6. At Avery House until September 19. At Fort Meikel September 19 to October 3. At Battery 27 until October 5. Moved to Poplar Springs Church October 5 and built Fort Urmston October 5-12. At Battery 16 October 12-25. Ordered to City Point October 25, and duty in the Defenses there until January, 1865. Joined 6th Army Corps at Weldon Railroad January 15, and stationed at Fort Fisher until April. Fort Fisher March 25. Assault on and fall of Petersburg April 2. Moved to City Point and duty there until May 3. March to Washington, D.C., March 3-18. Grand Review May 23. Mustered out June 15, 1862.

Losses: Died of disease 21.