Organized by transfer of detachments from 8th and 29th Regiments New York Infantry, who were detached to serve guns of Varian's Battery during Bull Run Campaign of 1861. Battery reorganized at Washington, D. C., and mustered in August 16, 1861, being designated 2nd N.Y. Independent Battery, December 7, 1861. Attached to Blenker's Brigade, Division of the Potomac, to October, 1861. Blenker's Brigade, Hooker's Division, Army of the Potomac, to November, 1861. Blenker's Division, Army of the Potomac, to March, 1862. 1st Brigade, Blenker's 2nd Division, 2nd Army Corps, Army of the Potomac, to April, 1862. 1st Brigade, Blenker's Division, Dept. of the Mountains, to June, 1862. 1st Brigade, 1st Division, 1st Corps, Pope's Army of Virginia, to September, 1862. Artillery, 1st Division, 11th Army Corps, Army of the Potomac, to March, 1863. Reserve Artillery, 11th Army Corps, to May, 1863. Artillery Brigade, 11th Army Corps, to June, 1863.
SERVICE.--Duty in the Defenses of Washington, D. C., August, 1861, to April, 1862. Operations in the Shenandoah Valley, Va., May to August, 1862. Strasburg June 1. Woodstock June 2. Near Woodstock, Edenburg and Mr. Jackson June 3. Near Harrisonburg June 6. Battle of Cross Keys June 8. Pope's Campaign in Northern Virginia August 16-September 2. Fords of the Rappahannock August 21-23. Waterloo Bridge August 24-25. Sulphur Springs August 26. Battles of Gainesville August 28; Groveton August 29; 2nd Bull Run August 30. Duty in the Defenses of Washington, D.C., until December. March to Fredericksburg, Va., December 10-16. Duty at Falmouth and Brook's Station until April, 1863. "Mud March" January 20-24, 1863. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Three years men transferred to Battery "I," 1st New York Light Artillery, June 6, 1863. Battery mustered out June 13, 1863.
Battery lost during service 1 Officer and 4 Enlisted men killed and mortally wounded and 5 Enlisted men by disease. Total 10.