 In its service, in 1861, it lost one enlisted man, accidentally killed, and it took part in the advance into Virginia on 24 May 1861.The regiment was housed in the Capitol Buildings at Washington from April 25–May 2, and was mustered into Federal service on April 26, serving duty at Camp Cameron, Meridian Hill, Georgetown Heights, from May 2–23.After occupation of Arlington Heights, Virginia, May 24–26, it assisted in building Fort Runyon and was mustered out at New York City on June 3, 1861.