The 26th Massachusetts Infantry Regiment lost 3 officers and 61 enlisted men killed and mortally wounded and 3 officers and 182 enlisted men to disease during the Civil War.

1861
August 28 Organized at Camp Cameron, Cambridge
September 23 Moved to Camp Chase, Lowell
November 19 To Boston
November 21 Sailed on Steamer Constitution to Ship Island, Miss.
December 3 Arriving Ship Island, and occupation duty there
1862
March 2nd Brigade, Dept. of the Gulf
March 8 Skirmish at Mississippi City
April 15-18 Movement to the passes of the Mississippi River
April 18-28 Operations against Forts St. Phillip and Jackson
April 28 Occupation of Forts St. Phillip and Jackson
July Moved to New Orleans, La., and duty there
September 13-15 Expedition to Pass Manchac and Ponchatoula (1 Company)
September 14-15 Ponchatoula (1 Company)
October Defenses of New Orleans, Dept. of the Gulf
1863
January 2nd Brigade, 2nd Division, 19th Army Corps, Dept. of the Gulf
June 20 Moved to LaFourche Crossing
June 20-21 Action at LaFourche Crossing, Thibodeaux
June 26 Moved to Bontee Station
June 30 To Jefferson Station
July 15 Moved to New Orleans and Provost duty there. Attached to 2nd Brigade, 3rd Division, 19th Army Corps, Dept. of the Gulf
August 28-29 Moved to Baton Rouge
September 4-11 Sabine Pass Texas Expedition
September 12 -16 At Algiers
September 16 Moved to Brashear City and Berwick City
September 23 To Camp Bisland
October 3-
November 30
Western Louisiana “Teche” Campaign
December At New Iberia
1864
January 7-9 Moved to Franklin and duty there
February 24 Moved to New Orleans and duty there. Attached to 2nd Brigade, 2nd Division, 19th Army Corps, Dept. of the Gulf
March 22 Camp at Carrollton. Veterans on leave.
May 20 Veterans return from leave
June 8 Moved to Morganza and duty there. Attached to 1st Brigade, 2nd Division, 19th Army Corps, Dept. of the Gulf
July 3-4 Moved to New Orleans
July 11-21 To Fortress Monroe and Bermuda Hundred, Va.
July 22-28 On the Bermuda Hundred front
July 28-30 Demonstration on north side of the James
July 28-29 Deep Bottom
July 30-August 1 Moved to Washington, D.C.
August 1 To Tennallytown
August Sheridan’s Shenandoah Valley Campaign. Atached to Army of the Shenandoah, Middle Military Division
September 19
Third Battle of Winchester (Opequan)
September 22
Fisher’s Hill
October 19
Battle of Cedar Creek

Non-Veterans left front.

November 7 Non-Veterans mustered out. Provost duty at Headquarters of Middle Military Division and Army of the Shenandoah at Winchester
1865
January Attached to 2nd Brigade, 1st Division, 19th Army Corps, Army of the Shenandoah
April Attached to 2nd Brigade, 1st Provisional Division, Army of the Shenandoah, then 2nd Brigade, 1st Division, Dept. of Washington, 22nd Army Corps
May 1 -2 Moved to Washington, D.C. and camp there
June 3 – 7 Moved to Savannah, Ga. and Provost duty there. Attached to Dept. of the South.
August 26 Mustered out
September 12-18 Moved to Boston, Mass. and discharged from service