|12th Regiment Massachusetts Volunteer Infantry|
|Active||June 14, 1861–July 8, 1864|
|Country||United States of America|
|Part of||In 1863: 2nd Brigade (Baxter's), 2nd Division (Robinson's), I Corps, Army of the Potomac|
|Colonel Fletcher Webster|
Colonel (later Brigadier General) James L. Bates
|I Corps badge (2nd Division)|
Massachusetts U.S. Volunteer Infantry Regiments 1861-1865
|11th Massachusetts Infantry Regiment||13th Massachusetts Infantry Regiment|
The 12th Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union army during the American Civil War. It was formed on June 14, 1861, in Boston, Massachusetts. Its original commander was Colonel Fletcher Webster, son of the famed U.S. Senator from Massachusetts, Daniel Webster. The unit was known as the "Webster Regiment" after its first colonel.
Organization and early duty
Col. Webster began recruiting in April 1861 shortly after the attack on Fort Sumter. At that time, most recruits in Massachusetts were used to fill up the ranks in the existing state militia regiments, therefore it was several weeks before Webster had managed to recruit a full regiment. The unit was trained at Fort Warren in Boston harbor. On July 19, 1861, the regiment was reviewed by Governor John Albion Andrew on Boston Common and presented with its colors. On July 23, the 12th Massachusetts departed Boston for the war front.
The regiment was first assigned to the Army of the Shenandoah under the command of Major General Nathaniel P. Banks. Until the spring of 1862, the regiment was employed in uneventful picket duty in the vicinity of Frederick, Maryland. In late February, the 12th Massachusetts, as part of Brigadier General John Abercrombie's brigade, moved into Virginia. On April 18, 1862, while on picket duty along the Rappahannock River the men of the 12th Massachusetts exchanged sporadic fire with Confederates on the other side of the river. This was the first time the unit was engaged in hostile fire.
- Colonel Fletcher Webster—son of Congressman Daniel Webster.
- Private John Edward Gilman, Company E - 40th Commander-in-Chief of the Grand Army of the Republic, 1910-1911
- "Twelfth Regiment Massachusetts Volunteer Infantry". Massachusetts Soldiers, Sailors, and Marines in the Civil War. Massachusetts Adjutant General. 1937. Archived from the original on 2011-08-22. Retrieved September 10, 2011.
- Bowen, James L. (1889). Massachusetts in the War, 1861–1865. Clark W. Bryan & Co.
- Schouler, William (1868). A History of Massachusetts in the Civil War. E.P. Dutton & Co.