This Battalion, composed of the 21st, 24th, 25th and 26th Companies of Unassigned Infantry, recruited at Augusta, Me., in February and March, 1865, to serve one year, and designed for the 15th Regiment Maine Volunteers, was organized as the 1st Battalion Infantry on the 25th of May, there being no vacancy in the 15th Me. The above named companies were lettered A, B, C and D, respectively.
The battalion was assigned to the 2d brigade, Dwight'd Division, then in the Shenandoah Valley, and afterwards proceeded to Washington, D. C., where they remained until the first of June, on which day they embarked for Savannah, Ga.
On the 6th of July the battalion was ordered to South Carolina, and did duty at different places in thet State until the 5th of April, 1866, when its term of service having expired, it was mustered out of the U. S. service, at Charleston, S. C., by Major Leslie Smith, Commissary of Musters, and immediately left for Hart's I(sland, New York Harbor, where the men werepaid and finally discharged.