The 1st Massachusetts Cavalry was organized at Camp Brigham in Readville, Massachusetts beginning September 3, 1861 and mustered in under the command of Colonel Robert Williams.
The regiment was attached to the Department of the South to April 1862. 3rd Brigade, 1st Division, Department of the South, to August 1862. Companies A through H moved to Fort Monroe August 19, 1862, then moved to Washington, D.C., and joined Pleasanton's Cavalry, Army of the Potomac, at Tenallytown, September 3. Attached to Pleasanton's Cavalry, Army of the Potomac, to October 1862. Averill's Brigade, Cavalry Division, Army of the Potomac, to January 1863. 1st Brigade, 2nd Division, Cavalry Corps, Army of the Potomac, to April 1865. Four new companies (I, K, L, and M) were organized December 5. 1863 to January 14, 1864. Provost Marshal's Command, Army of the Potomac, to May 1865. Headquarters, Army of the Potomac, to June 1865.
The 1st Massachusetts Cavalry mustered out of service on June 29, 1865 and was discharged at Readville on July 24, 1865.
Second Battalion left Massachusetts for New York December 27, and Third Battalion December 29 for the same point, then sailed for Hilton Head, S.C., January 13, arriving January 20, 1862. The men sailed on the steamships Baltic, Empire City, and Marion, and the horses sailed aboard Star of the South, and Catawba.[2] Duty at Hilton Head, S.C., until May 1862.
1862
Moved to Edisto Island, S.C., May (Companies E through M).
Kearneysville, Shepherdstown, and Smithfield October 16–17.
Four companies with V Corps October 30-November 25.
Four companies near Hagerstown, Md., until November 16, then moved to Washington November 16–25, and duty there refitting until December 13, Bloomfield November 2–3.
Battle of Gettysburg July 2–3. Commanded by Colonel Horace B. Sargent, Colonel John B. McIntosh's 1st Brigade of Brigadier General David McMurtrie Gregg's Second Division [5] of Major General Alfred Pleasonton's Cavalry Corps, Army of the Potomac
Emmetsburg July 4.
Williamsport July 6–7.
Near Harpers Ferry, W. Va., July 14.
Old Antietam Forge, near Leitersburg, July 10.
Jones' Cross Roads July 12.
Shepherdstown July 16.
Near Aldie July 31.
Scout to Hazel River August 4.
Rixeyville August 5.
Welford's Ford August 9.
Scout to Barbee's Cross Roads August 24.
Scout to Middleburg September 10–11.
Advance from the Rappahannock to the Rapidan September 13–17.
Demonstration north of the James River August 14–18.
Gravel Hill August 14.
Strawberry Plains August 14–18.
Battle of Globe Tavern (August 18–21). Commanded by Chamberlain, Colonel William Stedman's 1st Brigade, Gregg's 2nd Division, Cavalry Corps, Army of the Potomac
Charles City Cross Roads August 18.
Weldon Railroad August 19–21.
Dinwiddie Road, near Ream's Station, August 23.
Ream's Station August 25.
Hawkinsville September 14.
Jerusalem Plank Road September 16.
Belcher's Mills September 17.
Poplar Grove Church September 29-October 2.
Davis' Farm September 30.
Arthur's Swamp September 30-October 1.
Vaughan Road October 1. (Veterans left the front for Massachusetts October 25, 1864.)
Battle of Boydton Plank Road (October 27–28, 1864), Hatcher's Run, Commanded by Chamberlain, Brigadier GeneralHenry E. Davies's 1st Brigade, Gregg's 2nd Division, Cavalry Corps, Army of the Potomac
Company C commanded by Capt Edward A. Flint and Company D commanded by Captain Jamesserving in Provost Guard, Headquarters, Army of the Potomac
Eight companies commanded by Maj John Tewksbury in Brevet Brigadier General Charles H. T. Collis's Independent Brigade, Headquarters, Army of the Potomac
Provost duty until May 27.
Duty in the defenses of Washington until June 26.
Detached Duty
Third Battalion (Companies I, K, L, and M)
Served duty in District of Beaufort, S.C., until August, 1862 Action at Pocotaligo, South Carolina, May 22, 1862 (detachment).
Patrol and guard duty and picketing Broad River.
Expedition to St. John's Bluff, Fla., September 30-October 13, 1862.
Company M at Hilton Head, S.C., and outpost duty at Lawton's Plantation until August 1863.
A detachment of Company I served at Folly Island, S.C., until July 1863, and Morris Island, S.C., to August 1863.
The balance of Company I was on outpost duty at Hilton Head, S.C., June to August 1863.
Third Battalion was permanently detached from the 1st Massachusetts Cavalry by S. C. 346, War Department, August 4, 1863, and designated Independent Battalion, Massachusetts Cavalry.
Casualties
The regiment lost a total of 239 men during service; 6 officers and 93 enlisted men killed or mortally wounded, 140 enlisted men died of disease.
^Starr, Stephen Z. (1975). "The First Massachusetts Volunteer Cavalry, 1861-1865: A Fresh Look". Proceedings of the Massachusetts Historical Society. 87: 88–104. JSTOR25080777.
^Relieved of command May 4, 1863 (see: Averell's report and Official Records, Series I, Volume XXV, Part 1, page 1080)
^The Second and Third Divisions, First Brigade, First Division and the Reserve Brigade, with Battery A, 2nd United States and Batteries B and L, 2nd United States on the "Stoneman Raid," April 29-May 7, 1863
Allen, Stanton P. and H. G. Laskey. Down in Dixie: Life in a Cavalry Regiment in the War Days, from the Wilderness to Appomattox (Boston: Lothrop), 1893.
Bowditch, Henry I. Memorial [of Nathaniel Bowditch, Lieutenant, First Massachusetts Cavalry, 1839-1863] (Boston: J. Wilson & Son), 1865.