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

1861
April 30 Left Brooklyn for Washington D.C. on the steamer Star of the South under Colonel Michael Bennett, Lieutenant Colonel Edward Burns, and Major William Brewster. Colonel Bennett had been injured when thrown from a wagon, and Lieutenant Colonel Burns commanded the regiment
May Mustered in for three months Federal service
May – July Duty in the defences of Washington
May 24 Advance into Virginia and occupation of Arlington Heights
June 2 Skirmish near Chain Bridge
August 5 Mustered out of Federal service at Brooklyn
1863
June 20 Organized for 30 days’ service under Colonel Bennett
June 20 Left State for Harrisburg, Pa.
Duty at Marysville, Md., Carlisle and Gettysburg, Pa. Attached to 2nd Brigade, 1st Division, Dept. of the Susquehanna
July 1 Duty at Arsenal, New York, during Draft Riots.
July 2 Skirmish near Fort Washington, Pennsylvania
July 23 Mustered out of Federal service
1864
September 2 Again entered service for 100 days under Colonel David A. Bokee
November 13 Mustered out of Federal service