This Regiment was organized at Bangor, Me., leaving there May 14th, 1861, and was mustered into the U. S. service at Willett’s Point, Long Island, N. Y., May 28th, 1861, to serve two years.

Arrived at Washington on the 31st, and encamped on Meridian Hill until July 1st, and at Falls Church, Va., until the 16th.

It took a prominent part in the battle of Bull Run July 21st, losing in the engagement 47 killed and wounded, and over 100 missing.

Arriving in Washington on the 23d, they garrisoned at Fort Corcoran until the middle of Oct., when they were assigned to the 1st Brigade, Porter’s Division, and left the Fort for Hall’s Hill, remaining there until the 1st of March, 1862, at which time they advanced with the Army of the Potomac on Manassus; afterwards participated in the siege of Yorktown.

On the 27th of May, the regiment was engaged at the battle of Hanover Court House. During this engagement their loss in killed was slight, though the number of wounded was large.

The regiment took a prominent part in the battle of Gaines Hill, and during the seven days retreat was repeatedly under fire, and at the battle of Malvern Hill successfully held a dangerous and conspicuous position during the day, losing but few men.

They remained several weeks at Harrison’s Landing, when on its evacuation they were ordered to join Gen. Pope’s Army, and on the 30th of August participated in the battle of Manassas.

They retreated with the army to Washington and encamped on Arlington Heights, where after remaining three days they marched into Maryland.

At the battle of Antietam on the 17th of Sept., the regiment was under fire in the reserve, and after the battle were among the first to enter Sharpsburg after the enemy had left.

Shortly after this the regiment in an effort to ford the river at Shephardstown, was confronted by a largely superior force of the enemy, and under a galling fire, were obliged to reford the river.

On the 13th of Dec., the regiment took a prominent part in the battle of Fredericksburg. Their loss in killed and wounded in that engagement was very heavy.

During Gen. Hooker’s operations at Fredericksburg and Chancellorsville, the regiment formed a part of the right wing of his army, and at the last named battle in May, 1863, was mostly behind breastworks.

When the regiment’s time expired in May, 125 of the number of men who were sworn in for three years, were transferred to the 20th Me. Vols., and the remainder, 275, including officers and men, returned to Maine, where they were mustered out of the U. S. service at Bangor, June 4th and 9th, 1863, by Capt. Thomas C. J. Baily, 17th U. S. Infantry.