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Twenty-first regiment Massachusetts Infantry.
（1)
Col. Augustus Morse.
（2)
Col. William S. Clark.
| Field and Staff. | Line. | Band. | companies. | Unassigned Recruits. | Totals. |
| | | | A | B | C | D | E | F | G | H | I | K |
| Number on regimental rolls,— |
| Officers, | 18 | 58 | – | – | – | – | – | – | – | – | – | – | – | – | 76 |
| Enlisted men,1 | 19 | – | 25 | 111 | 110 | 110 | 100 | 119 | 102 | 115 | 107 | 117 | 129 | 29 | 1,193 |
| Totals, | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1,269 |
| Enlisted men (included above) commissioned in regiment.2 | 9 | – | – | 5 | 3 | 2 | 4 | 3 | 1 | 3 | 2 | 3 | 2 | – | 37 |
| Enlisted men (included above) serving elsewhere within regiment. | – | – | – | 2 | 1 | 1 | – | 2 | 1 | 4 | 1 | 1 | 2 | – | 15 |
| Totals, | 9 | – | – | 7 | 4 | 3 | 4 | 5 | 2 | 7 | 3 | 4 | 4 | – | 52 |
| Actual total of members of regiment,— |
| Officers, | 18 | 58 | – | – | – | – | – | – | – | – | – | – | – | – | 76 |
| Enlisted men,3 | 10 | – | 25 | 104 | 106 | 107 | 96 | 114 | 100 | 108 | 104 | 113 | 125 | 29 | 1,141 |
| Totals, | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1,217 |
The 21st Mass. Infantry was organized during July and August, 1861, in camp at
Worcester, Mass., and was mustered into service on varying dates from August 16 to the 23d, when it left the
State in command of
Col. Augustus Morse, and, remaining in
Baltimore a few days, moved on the 29th to
Annapolis, Md., and encamped.
On September 17 the regiment was remustered.
In command of
Lieutenant-Colonel Maggi, and forming part of
General Reno's brigade, it sailed January 9 for
North Carolina in the
Burnside expedition.
It suffered loss in the charge and capture of the enemy's works at the
battle of Roanoke Island February 8, was closely engaged at New Berne March 14, and took part in the expedition to
Camden April 17-22.
The regiment moved with its brigade to Newport News July 6, becoming part of the 2d Brigade,
Reno's Division, 9th Army Corps.
Joining
General Pope's forces at the
Rapidan, it engaged at
Manassas August 30, and met heavy loss at
Chantilly September 1.
It was engaged at
South Mountain and
Antietam, and was active at
Fredericksburg, encamping afterward at
Falmouth, Va. Leaving camp Feb. 9, 1863, the regiment moved to
Kentucky, to serve as part of the 9th Corps in the department of the Ohio, and went into camp at
Mt. Sterling, Ky., April 3, moving in July to
Lexington and in August to
Camp Nelson on the
Kentucky River.
On September 12 it left camp for
Knoxville, Tenn., and engaged in action at
Blue Springs October 10 and at
Campbell's Station November 16.
During the siege of
Knoxville it took part in a charge on the morning of November 24.
While encamped near
Rutledge, Tenn., after the raising of the siege, all but 24 of the members of the regiment re-enlisted for another term, and January 7 left camp to spend their furlough in
Massachusetts.
Leaving the
State March 18, on its return to duty the command joined the 9th Corps at
Annapolis and became part of the 2d brigade,
General Stevenson's division.
It took part at the
Wilderness May 6 and was active at
Spotsylvania May 10, 12 and 18; it shared in the movements to
North Anna and in the engagements at Cold Harbor.
Reaching the vicinity of
Petersburg June 16, it took part in the assault on that day and was closely engaged again on the 17th.
The regiment shared afterward in the duties of the siege, taking part with its division in the charge at the ‘Crater’ July 30.
On August 22 those whose term of service had expired returned to
Massachusetts and were mustered out Aug. 30, 1864.
The remainder, as a battalion of three companies, under command of
Capt. Orange S. Sampson, still serving in the trenches, engaged in action at the Weldon Railroad in August, and at Poplar Spring Church on September 30, when
Captain Sampson was killed.
On Oct. 21, 1864, the command was transferred to the 36th Mass. Infantry by order of the War Department.
