Left State with 5th Massachusetts Volunteer Militia April 21, 1861, for Fortress Monroe, Va., arriving April 23; thence moved to Annapolis, Md., April 23-24. Quartered in Naval School Building until May 4. At Relay House May 6 to June 13. Mustered into United States service May 18, 1861, for three months. Duty at Camp Clare, near Baltimore, Md:, and in Monument Square until August 2. Mustered out August 2, 1861.