Mustered in: September 12 to December 19, 1861.
Consolidated with the 15th regiment of cavalry and designated 2nd provisional regiment of cavalry: June 17, 1865.

This regiment was organized originally by Col. O. De Forrest for the Ira Harris Cavalry Brigade, under special authority from the War Department, at New York city, and was, after having been turned over to the State, November 20, 1861, designated the Sixth Regiment of Cavalry, with Thomas C. Devin as Colonel. The companies were mustered in the service of the United States: At New York city, Company A September 12th, B September 27th, D September 28th, and I November 2d; at Staten Island, Company E October 3d, F October 24th, H October 28th, L November 6th, K and M December 19th; at Rochester, Company C September 29th, and at Binghamton, Company G October 24, 1861. At the expiration of its term of service those entitled thereto were discharged and the regiment retained in service.

The companies were recruited principally: A at New York city and Cohoes and Boston, Mass.; B and L at New York city; C at Rochester, Cohocton, Geneseo, Hornells-ville and Dansville; D at Troy, Cherry Valley, Granville and New York city; E at New York city, Albany, Watertown, Cherry Valley, Salt Springs and Cape Vincent; F at New York city and Poughkeepsie; G at Binghamton, Rochester, Hornellsville and Albion; H at New York city, Dover Plains and Washington; I at New York city, Cuba, Franklin-ville, Gouverneur, Angelica and Binghamton; K at Ogdensburg, Geneseo, Lisbon and Canton; and M at Kinderhook and Hudson.

The regiment left the State December 23, 1861, commanded by Col. Thomas C. Devin, appointed in November, 1861, and served at York, Pa., from that time. In March, 1862, Companies D and K, and F and H, 3d Battalion, were mounted and assigned, two each, to the 2d and 4th Corps, Army of the Potomac, respectively; the 1st and 2d Battalions were attached to General Wadsworth's command, and mounted in May, 1862. Companies D and K served with the 2d Corps until July, 1863; in the Department of Washington until October, 1863; and F and H with the 4th Corps until August, 1863, when they rejoined the regiment. The 1st and 2d Battalions served with the 9th Corps from August, 1862 (Company A with the 6th Corps in September, 1862) ; in the 2d Brigade, Pleasanton's Cavalry Division, Right Grand Division, Army of the Potomac, from December, 1862; in the 2d Brigade, 1st Division, Cavalry Corps, Army of the Potomac, from February, 1863 (Companies B and C with 9th Corps in January and February, 1863; a detachment with 22d Corps in July and August, 1863) ; with the Army of the Shenandoah from October, 1864; and with the Army of the Potomac from March 26, 1865.

June 17, 1865, under command of Col. Charles L. Fitzhugh, the regiment was consolidated into eight companies, and these, with the 15th N. Y. Volunteer Cavalry, formed into a new organization known as the "2d Provisional Regiment, N. Y. Volunteer Cavalry," becoming Companies A, B, C, D, E, I, L and M of the latter.

During its service the regiment lost, by death, killed in action, 5 officers, 49 enlisted men; of wounds received in action, 4 officers, 24 enlisted men; of disease and other causes, 133 enlisted men; total, 9 officers, 206 enlisted men; aggregate, 215; of whom 36 enlisted men died in the hands of the enemy.

Thomas C Devin