The following is taken from New York in the War of the Rebellion, 3rd ed. Frederick Phisterer. Albany: J. B. Lyon Company, 1912.

Col. Lewis G. Morris, succeeded by Col. Wm. H. Morris, received August 14, 1862, authority to recruit a regiment in the counties of Putnam, Rockland and Westchester. The regiment was organized under Col. W. H. Morris and Lieut.-Col. J. Howard Kitching, at Yonkers, as the 135th Regiment of Infantry, and there mustered in the service of the United States for three years, September 2, 1862; having been converted into an artillery regiment, it was, October 6, 1862, designated the 6th Regiment of Artillery, and two additional companies were recruited for it and mustered, December 4, 1862, in the United States service for three years; Company M was consolidated into Company A, January 26, 1864, and a new company formed of the men recruited by M. R. Pierce, for the 14th Artillery, transferred to this regiment January 13, 1864; February 2, 1864, surplus men of the I4th and 16th Artillery, about 400, were also transferred to this regiment. June 28, 1865, the men whose term of service would expire October I, 1865, were, under the command of Col. George C. Kibbe, mustered out at Petersburg, Va.; those remaining were organized into a battalion of four companies, A, B, C and D; and there were added to them, July 19, 1865, the men not discharged at the muster-out of their regiments, of the 10th Artillery, forming Companies L, F and G, and of the 13th Artillery, forming Companies H, I, K, L and M, thus reorganizing the regiment.

The original companies were recruited principally: A and F at Peekskill and Yonkers; B at Greenburgh, White Plains, Scarsdale, Harrison and Mt. Pleasant; C at West Farms; D at Somers, North Salem, Bedford and Poundridge; E at Port Chester, Harrison, New Rochelle, Mamaroneck and Rye; G at South East, Kent and Carmel; H at Morrisania; I at Ossining, New Castle, Yorktown, Cortland, Mt. Pleasant and Bedford; K at Orangetown, White Plains, West Farms, Clarkstown, Scarsdale and Greenburgh; L at Cold Springs, Carmel, Yorktown and Greenborough, at Paterson and town of Kent, N. J.; and Company M at Haverstraw, Yonkers, Somers, Poundridge, Bedford, Mt. Pleasant, North Salem and New Castle.

The regiment (ten companies) left the State, September 5, 1862, and served in the Railroad Division of the 8th Corps, Middle Department, from September, 1862; Companies L and M joined it at Baltimore, Md., in December, 1862; the regiment served at Harper's Ferry, W. Va., defenses of the Upper Potomac, from January, 1863; in the 2d Brigade, 1st Division, 8th Corps, from March 27, 1863; in the 1st Brigade, 1st Division, 8th Corps, from June, 1863; in the 1st Brigade, 3d Division, 3d Corps, Army of Potomac, from July 10, 1863; with the Reserve Artillery, Army of Potomac, as Ammunition Guard from August, 1863; in the 1st Brigade, Reserve Artillery, Army of Potomac, from April, 1864; in the Heavy Artillery Brigade, 5th Corps, from May 13, 1864; in the 3d Division, 5th Corps, from May 30, 1864; in the 3d Brigade, 2d Division, 5th Corps, from June 2, 1864; in the 1st Brigade, Harden's Division, 22d Corps, from July, 1864; in the 1st Brigade, Kitching's Provisional Division, Army of the Shenandoah, from September 27, 1864; in the 2d Brigade, Ferrero's Division, Army of the James, at Bermuda Hundred, Va., from December, 1864. It served as heavy artillery and infantry.

Commanded by Col. Stephen Baker, the regiment was honorably discharged and mustered out August 24, 1865, near Washington, D. C., having during its service lost by death, killed in action, 1 officer, 62 enlisted men; of wounds received in action, 5 officers, 68 enlisted men; of disease and other causes, 6 officers, 278 enlisted men; total, 12 officers, 408 enlisted men; aggregate, 420; of whom 57 enlisted men died in the hands of the enemy.

The following is taken from The Union army: a history of military affairs in the loyal states, 1861-65 -- records of the regiments in the Union army -- cyclopedia of battles -- memoirs of commanders and soldiers, Volume II: New York, Maryland, West Virginia and Ohio. Madison, WI: Federal Pub. Co., 1908.

Sixth Artillery (Heavy).—Cols., William H. Morris, J. Howard Kitching, George C. Kibbe, Stephen D. Baker; Lieut. -Cols., J. Howard Kitching, Ralph E. Prime, Edward R. Travis, Edward B. Williston, James B. Campbell, George C. Kibbe, Stephen D. Baker; Majs., J. H. Robinson, Edward R. Travis, Frederick Shonnard, James B. Campbell, Absalom A. Crookston, George C. Kibbe, Stephen D. Baker, Edmund Y. Morris, Ferd. R. Hassler, C. H. Palmer, Edward Jones. This regiment, known as the Anthony Wayne Guard, was recruited in the summer of 1862 in the counties of Putnam, Rockland and Westchester. It was organized at Yonkers as the 135th infantry and was there mustered into the U. S. service for three years, Sept. 2, 1862. It was converted into an artillery regiment in October and designated the 6th regiment of artillery, two additional companies recruited for it being mustered in on Dec. 4. After the consolidation of Co. M and Co. A in Jan., 1864, a new Co. M, composed of men recruited by M. R. Pierce for the 14th N. Y. artillery, was transferred to it, and in Feb., 1864, about 400 of the surplus men of the 14th and i6th artillery were also transferred to this regiment. On June 28, 1865, the men whose terms would expire on Oct. i, were mustered out at Petersburg, under command of Col. Kibbe, the veterans and recruits being formed into a battalion of four companies. On July 19, 1865, the remaining members of the loth and 13th artillery were transferred to this battalion, and this consolidated force was mustered out on Aug. 24, near Washington, D. C, under command of Col. Baker. The regiment— ten companies—left the state on Sept. 5, 1862, and Cos. L and M joined it at Baltimore in December. It served with the 8th corps at Harper's Ferry and in the defenses of the Upper Potomac until July, 1863, when it was attached to the 1st brigade, 1st division, 3d corps, and in August, to the reserve artillery, Army of the Potomac, employed as ammunition guard. It took part in an action at Manassas gap in July, 1863, and in the Mine Run campaign in November. Then, as infantry and heavy artillery, it served until July, 1864, with the 5th corps. Army of the Potomac, being active in all the battles leading up to the investment of Petersburg, including the Wilderness, Spottsylvania, where its casualties amounted to 18 killed, 131 wounded and 6 missing, the North Anna, where it lost 17 killed, 99 wounded and 17 missing, Totopotomy, Cold Harbor, and the assault on Petersburg in June, with a loss of 92. In July it was attached to the 1st brigade, Hardin's .division, 22nd corps, and in August was ordered to Washington for garrison duty, remaining there for five weeks, when it was ordered to join the Army of the Shenandoah, attached to the 1st brigade, Kitching's provisional division, and later to the 2nd brigade, Ferrero's division. Army of the James, at Bermuda Hundred. In the battle of Cedar creek it was heavily engaged, losing 94 killed, wounded and missing, both Col. Kitching and Maj. Jones being mortally wounded. It was present at the fall of Petersburg on April 2, 1865. The regiment lost by death during service 6 officers and 130 men killed and mortally wounded; 6 officers and 278 men died of disease, accident, in prison, etc., a total of 420.