The following is taken from New York in the War of the Rebellion, 11th ed. Frederick Phisterer. Albany: J. B. Lyon Company, 1912.

Captain Albert Von Puttkammer received authority October 26, 1861, to recruit a battery— Independent Battery, Flying Artillery; it was recruited under the auspices of the Young Men's Christian Association at Albany, and there mustered in the service of the United States for three years. About the same time another battery was recruited by Capt. Robert C. Warmington at Ashtabula, Ohio, and Buffalo. These two batteries, incomplete, were consolidated January 15-, 1862, and the nth Battery formed. At the expiration of its term of service, the men entitled thereto were discharged and the battery retained in service. It left the State with Albert Von Puttkammer as Captain, January 17, 1862, and served at and near Washington, D. C., from that time; in the Reserve Corps, Army of Virginia, from June 26, 1862; in the 3d Division, 3d Corps, Army of the Potomac, from November, 1862; in the Artillery Brigade, 3d Corps, from May, 1863; in the 4th Volunteer Brigade, Artillery Reserve, Army of the Potomac, from May 12, 1863; with Battery K, 1st N. Y. Volunteer Artillery, from June, 1863; in the 2d Volunteer Brigade, Artillery Reserve, Army of the Potomac, from January, 1864; in the 3d Brigade, Artillery Reserve, Army of the Potomac, from April, 1864; in Artillery Brigade, 2d Corps, from May 16, 1864; with the 1st Division, in August, 1864; and in the Artillery Reserve, Army of the Potomac, from May, 1865. Commanded by Capt. George W. Davey, the battery was honorably discharged and mustered out June 13, 1865, at Albany, having during its service lost by death, killed in action, 6 enlisted men; of wounds received in action, 2 enlisted men; of disease and other causes, 13 enlisted men; total, 21; of whom I 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.

Eleventh Independent Battery.—Capts., Albert Von Putkammer, John E. Burton, James T. Wyatt, George W. Davy. The ilth, the Havelock battery, was formed on Jan. 15, 1862, by the consolidation of two incomplete organizations—the independent battery, Flying Artillery, recruited at Albany under the auspices of the Young Men's Christian Association, and there mustered into the U. S. service for three years, and the battery recruited about the same time by Capt. Robert C. Warmington at Ashtabula, Ohio, and Buffalo, N. Y. The battery continued in service after the expiration of its term as a veteran organization. It left the state Jan. 17, 1862, commanded by Capt. Von Putkammer, and was stationed at Washington for a number of months. Attached to the reserve corps, Army of Virginia, it served in Pope's Virginia campaign, losing 2T, wounded and captured at Manassas and Bull Run bridge. In Nov., 1862, it moved with the 3d corps to Falmouth, where it joined Burnside's army, and later took part in the battle of Fredericksburg without loss. In the artillery brigade of the same corps it was heavily engaged at Chancellorsville, losing 11 killed, wounded and missing; at Gettysburg, where it fought attached to Battery K, 1st N. Y. artillery, it lost S men wounded. It was active in the Mine Run campaign, and in 1864 it was engaged in all the battles of Grant's campaign from the Wilderness to Petersburg. It took part in the first assault on the works of Petersburg, after which it was engaged at the Weldon railroad, Deep Bottom and Strawberry Plains. Its loss was 4 killed and wounded at Cold Harbor, 3 at the assault on Petersburg, and i at Strawberry Plains. In 1865 it was engaged in the last demonstrations on Petersburg and in the Appomattox campaign was engaged at White Oak ridge, Deatonsville road, Farmville and Appomattox Court House, but sustained no losses. The battery was mustered out on June 13, 1865, at Albany, under command of Capt. Davy. Its loss during service was 6 killed, 2 died of wounds received in action, and 13 of disease and other causes.Eleventh Independent Battery.—Capts., Albert Von Putkammer, John E. Burton, James T. Wyatt, George W. Davy. The ilth, the Havelock battery, was formed on Jan. 15, 1862, by the consolidation of two incomplete organizations—the independent battery, Flying Artillery, recruited at Albany under the auspices of the Young Men's Christian Association, and there mustered into the U. S. service for three years, and the battery recruited about the same time by Capt. Robert C. Warmington at Ashtabula, Ohio, and Buffalo, N. Y. The battery continued in service after the expiration of its term as a veteran organization. It left the state Jan. 17, 1862, commanded by Capt. Von Putkammer, and was stationed at Washington for a number of months. Attached to the reserve corps, Army of Virginia, it served in Pope's Virginia campaign, losing 2T, wounded and captured at Manassas and Bull Run bridge. In Nov., 1862, it moved with the 3d corps to Falmouth, where it joined Burnside's army, and later took part in the battle of Fredericksburg without loss. In the artillery brigade of the same corps it was heavily engaged at Chancellorsville, losing 11 killed, wounded and missing; at Gettysburg, where it fought attached to Battery K, 1st N. Y. artillery, it lost S men wounded. It was active in the Mine Run campaign, and in 1864 it was engaged in all the battles of Grant's campaign from the Wilderness to Petersburg. It took part in the first assault on the works of Petersburg, after which it was engaged at the Weldon railroad, Deep Bottom and Strawberry Plains. Its loss was 4 killed and wounded at Cold Harbor, 3 at the assault on Petersburg, and i at Strawberry Plains. In 1865 it was engaged in the last demonstrations on Petersburg and in the Appomattox campaign was engaged at White Oak ridge, Deatonsville road, Farmville and Appomattox Court House, but sustained no losses. The battery was mustered out on June 13, 1865, at Albany, under command of Capt. Davy. Its loss during service was 6 killed, 2 died of wounds received in action, and 13 of disease and other causes.