Organized at Elmira, N.Y., May 10, 1861. Mustered in July 2, 1861. Left State for Washington, D.C., July 5. Attached to Hunter's Brigade, Division of the Potomac, to October, 1861. Wadsworth's Brigade, McDowell's Division, Army of the Potomac, to March, 1862. 2nd Brigade, King's 3rd Division, McDowell's 1st Army Corps, Army of the Potomac, to April, 1862. 2nd Brigade, King's Division, Dept. of the Rappahannock, to June, 1862. 3rd Brigade, 1st Division, 3rd Corps, Pope's Army of Virginia, to September, 1862. 3rd Brigade, 1st Division, 1st Army Corps, Army of the Potomac, to January, 1863. Provost Marshal, General Patrick's Command, Army of the Potomac, to May, 1863.
SERVICE.--Duty in the Defenses of Washington, D. C., until March, 1862. Action at Ball's Cross Roads, Va., August 27-28, 1861 (Cos. "I" and "K"). Munson's Hill August 31 (Cos. "I" and "K"). Advance on Manassas, Va., March 10-15. At Upton's Hill until April 9. McDowell's advance on Falmouth, Va., April 9-19. Duty at Fredericksburg until May 25. McDowell's advance on Richmond May 25-29. Operations against Jackson June 1-21. At Falmouth until July 24. Reconnaissance to Orange Court House July 24-27. Pope's Campaign in Northern Virginia August 16-September 2. Fords of the Rappahannock August 21-23. Sulphur Springs August 23-24. Battles of Gainesville August 28; Groveton August 29; 2nd Bull Run August 30. Maryland Campaign September 6-22. Battles of South Mountain September 14; Antietam September 16-17. Duty in Maryland until October 29. Movement to Falmouth October 29-November 19. Battle of Fredericksburg, Va., December 12-15. Assigned to provost duty at Aquia Creek January to May, 1863. Chancellorsville Campaign April 27-May 6. Mustered out May 22, 1863, expiration of term. Three years men transferred to 80th Regiment New York Infantry.
Regiment lost during service 17 Enlisted men killed and mortally wounded and 2 Officers and 53 Enlisted men by disease. Total 72.