The 1st Vermont Heavy Artillery Regiment lost 10 officers and 154 enlisted men killed or mortally wounded and 2 officers and 410 enlisted men to disease during the Civil War.

1862
Organized at Brattleboro
September 1 Mustered in as 11th Vermont Infantry Regiment under Colonel James M. Warner
September 7 Left State for Washington, D.C. and attached to attached to 1st Brigade, Haskins’ Division, Military District of Washington for duty in the Defences of Washington north of the Potomac
September 27 Company A assigned to Fort Lincoln
Company B assigned to Forts Massachusetts and Stevens
Companies C and D assigned to Fort Saratoga
Company E assigned to Fort Totten
Company F assigned to Fort Bunker Hill
Company G assigned to Fort Lincoln
Company H assigned to Fort Slocum
Company I assigned to Fort Thayer
Company K assigned to Fort Totten
November 17 Company A moved to Fort Totten
Companies C and D moved to Fort Massachusetts
Company E moved to Fort Slocum
Company F moved to Fort Slocum
Company G moved to Fort Slocum
Company I moved to Fort Massachusetts
December 10 Designation of Regiment changed to 1st Heavy Artillery. Attached to 1st Brigade, Haskins’ Division, Military District of Washington
1863
February Attached to 1st Brigade, Haskins’ Division, 22nd Army Corps, Defenses of Washington
March Company A moved to Fort Lincoln
Company B moved to Fort Totten
Company C moved to Fort Stevens
Company D moved to Fort Saratoga
Company F moved to Fort Thayer
Company H moved to Fort Bunker Hill
Company I moved to Fort Bunker Hill
July 11 Company L organized and assigned to Fort Lincoln
October 7 Company M organized and assigned to Fort Lincoln
November 2 Captain Hunsdon of Company B was promoted to major.
1864
May 12 Ordered to Join army in the field, operating as infantry
May 15 Moved to Belle Plains, Va., and join 6th Army Corps at Spotsylvania Court House, Va. Attached to 2nd Brigade, 2nd Division, 6th Army Corps, Army of the Potomac
May 15-21 Spotsylvania Court House
May 23-26 North Anna River
May 26-28 Line of the Pamunkey
May 28-31 Totopotomoy
June 1-12 Cold Harbor
June 17-July 9 Before Petersburg
June 22-23 Jerusalem Plank Road
July 9-11 Moved to Washington, D.C.
July 11-12 Repulse of Early’s attack on Fort Stevens
July 15-23 Snicker’s Gap Expedition
August 7-November 28 Sheridan’s Shenandoah Valley Campaign; Attached to Army of the Shenandoah, Middle Military Division
August 21-22 Near Charlestown
September 2 Major Hunsdon was promoted to lieutenant colonel
September 13 Gilbert’s Ford, Opequan
September 19 Battle of Opequan, Winchester
September 22 Fisher’s Hill
October 19 Battle of Cedar Creek
October Duty at Strasburg
November 9 At Kernstown
December 9-12 Moved to Petersburg, Va.for Siege of Petersburg
1865
March 25 Fort Fisher, Petersburg
March 28-April 9 Appomattox Campaign
April 2 Assault on and fall of Petersburg. Pursuit of Lee.
April Duty at Burkesville
April 23-27 March to Danville
May 19-24 At Manchester. Colonel Warner was promoted t brigadier general, and Lieutenant Colonel Charles Hunsdon was promoted to colonel.
June At Munson’s Hill, Washington, attached to Middle Department, 8th Corps
June 8 Corps Review
June 24 Old members mustered out. Veterans and Recruits consolidated to a Battalion of four Companies, and duty at Fort Foote, Md., Defenses of Washington
August 25 Mustered out