First regiment Massachusetts Cavalry.
（1) Col. Robert Williams
, Brig. Gen.
U. S. Vols.
（2) Col. Horace Binney Sargent
, Bvt. Brig. Gen.
U. S. Vols.
（3) Col. Samuel Emery Chamberlain
, Bvt. Brig. Gen.
U. . Vols.
|Field and staff||Line||A||B||C||D||E||F||G||H||I||I1||K||K2||L||L3||M||M4||Recruits.||Totals.|
|Number on regimental rolls,--|
|Enlisted men (included above) commissioned in regiment.6||6||–||2||3||3||3||5||2||2||3||–||1||–||–||–||1||1||1||–||33|
|Enlisted men (included above) serving elsewhere within regiment.||–||–||3||2||1||3||2||2||–||1||1||–||1||1||–||–||–||1||–||18|
|Actual total of members of regiment,—|
The 1st Cavalry was made up almost entirely from State organizations already existing, including among its early volunteers members of the Boston Lancers
, Waltham Dragoons, North Bridgewater Dragoons and Springfield Horseguards.
The first enlistments were made in the early part of September, 1861, and on September 11 Robert Williams
, captain, assistant adjutant-general
, U. S. Army, was appointed by Governor Andrew
as colonel of the regiment, being recommended by Gen. Winfield Scott
The 1st Battalion, comprising Cos. A, B, C and D, under Maj. Greely S. Curtis
, left Massachusetts
December 25 and went to Annapolis, Md.
The 2d and 3d Battalions, leaving on December 26 and 28, remained ten days in New York and then went on to Hilton Head, S. C.
, and were joined in a short time by the 1st Battalion.
In the movement against Charleston, S. C.
, Colonel Williams
commanded the brigade of which the regiment formed a part.
The 1st and 2d Battalions joined the army of the Potomac in Virginia
, Aug. 19, 1862, and the 3d Battalion remained in South Carolina
in command of Maj. A. H. Stevens, Jr.
, three companies being stationed at Beaufort
and the other at Hilton Head
; here it remained for some months, engaging in picket and patrol duty, with a reconnoissance Oct. 22, 1862, to Pocotaligo, S. C.
; and in June, 1863, a detachment on duty at Folly
and Morris islands
took part in the siege of Fort Sumter
On Aug. 4, 1863, the battalion was permanently detached from the 1st Cavalry and called the Independent Battalion, Mass. Cavalry Vols., and engaged in the expedition to St. John's River
, Fla. By special order, dated Feb. 12, 1864, the Independent Battalion became 1st Battalion, 4th Mass. Cavalry, and under this organization was ordered to Virginia
in May, 1864, and its subsequent history will be found with the 4th Mass. Cavalry.
The 1st and 2d Battalions with the army of the Potomac took part in the marches and skirmishes which preceded the battles of Antietam
They took active part in the campaigns of 1863-64, a new battalion of four companies joining them at Warrenton, Va.
, in March, 1864.
The regiment was stationed on provost duty at City Point
in March, 1865, and served afterward in the defences of Washington
until mustered out June 26, 1865.
Present also at Poolesville
, South Mountain
, Chancelloreville, Upperville
, fortifications of Richmond
and Cold Harbor.