This Regiment was organized at Portland, Me., Sept. 29th, 1862, to serve nine months, and left on the 18th for Washington, D. C., where it arrived on the 20th.

On the 25th they moved to Seneca, Md., and were assigned the duty of guarding the several fords of the upper Potomac, to prevent the transportation of goods to Virginia. They were engaged in that duty until the 24th of May, 1863, when they moved to Alexandria, Va.

While at Alexandria they threw up rifle pits around the city, built barricades across the principal streets, and sent a large number of men daily on picket duty.

On the 17th of June they moved back to Poolesville, Md., and on the 24th to Maryland Heights, Md., opposite Harper's Ferry, Va.

On the 27th they were ordered to Portland, Me., where the men were mustered out and discharged the U. S. service on the 15th of the July by Lieut. F. E. Crossman, 17th U. S. Infantry.