The 56th Massachusetts Volunteer Infantry Regiment lost 6 officers and 120 enlisted men killed or mortally wounded and 100 enlisted men to disease during the Civil War.

1863
December 26 Began organization at at Readville
1864
March 21 Left State for Annapolis, Md.
April 23 Moved to Washington and Alexandria; Attached to 1st Brigade, 1st Division, 9th Army Corps, Army of the Potomac
May 3-June 15 Campaign from the Rapidan to the James
May 5-7
Battle of the Wilderness
May 8-21
Battle of Spottsylvania Court House
May 10 Ny River
May 12 Assault on the Salient
May 23-26 North Anna River
May 26-28 On line of the Pamunkey
May 28-31 Totopotomoy
June 1-12 Cold Harbor
June 1-3 Bethesda Church
June 16-18 First Assault on Petersburg
June 16, Siege of Petersburg begins
July 30 Mine Explosion, Petersburg
August 18-21 Weldon Railroad
September Assigned to the 2nd Brigade, 2nd Division, 9th Army Corps
September 29-
October 2
Poplar Springs Church or Peeble’s Farm
October 27-28 Boydton Plank Road, Hatcher’s Run
1865
January 1 At Fort Hays
March 25 Battle of Fort Stedman
March 28-April 9 Appomattox Campaign
April 2 Assault on and fall of Petersburg
April 3 Occupation of Petersburg
April 3-9 Pursuit of Lee
April 18-22 March to Petersburg and City Point
April 23-25 Moved to Alexandria
May 23 Grand Review
July Duty at Washington and Alexandria
July 12 Mustered out