In April of 1862 legislation changed the designation of militia units to “National Guard.”

1861
April 19 Left New York City for Washington, D. C., on special call of President Lincoln. Commanded by Colonel Marshall Lefferts, Lieutenant Colonel Wiliam A. Pond and Major Alexander Shaler
April 24-25 Occupation of Annapolis Junction, Md., and opening communications with Washington
April 25-May 2 In Capital Buildings at Washington
April 26 Mustered into United States service for thirty days and assigned to the Department of Washington.
May 2-23 Duty at Camp Cameron, Meridian Hill
May 24-26 Occupation of Arlington Heights, Va. Assist in building Fort Runyon.
May 26 Return to Camp Cameron
May 31 Returned to New York City
June 3 Mustered out of United States service at New York City
1862
May 25 Mustered in for three months’ United States service under Colonel Lefferts
May 26 Left New York City for Baltimore, Md. Attached to Dix’s Command, Middle Department
May 28 to June 5 Camp at Stewart’s Hill, Baltimore, Md.
June 6 –
August 28
Duty at Fort Federal Hill.
July Attached to 8th Army Corps, Middle Department
September 5 Mustered out of United States service at New York City
1863
June 16 Mustered in for thirty days’ United States service
June 17 Left State for Baltimore, Md. Attached to Morris’ Brigade, 8th Army Corps, Middle Department
June 18 – July 5 Duty at Fort Federal Hill and provost duty in Baltimore, Md.
July 5 Ordered to Frederick, Md. and picket and outpost duty
July 7 Attached to 3rd Division, 3rd Army Corps, Army of the Potomac
July 14 Left for New York City
July 16 Reached New York
July 16-21 On duty during Draft Riots
July 21 Mustered out of United States service