New York in the War of Rebellion, 1861-1865, 1912
by Frederick Phisterer
Twenty Fifth Regiment of Cavalry
September 4, 1863, Col. Henry F. Liebenau received authority from the Governor of the State to recruit a regiment of cavalry, which, January 15, 1864, received the above numerical designation. It was organized at Saratoga Springs and Hart's island, under Colonel Liebenau, and his successor, Col. Gurden Chapin, for a service of three years; Companies I and M, however, contained a few men enlisted for but one year. The companies were mustered in the service of the United States at Saratoga, A and B February 20; C and D March 19; E and F April 14 and 23, respectively; at Hart's island, G April 20; H July 29; I September 18; K May 16, and L and M October 15 and 20, 1864, respectively.
The companies were recruited principally; A at Hancock, Saratoga Springs, Fremont and Greene county; B at Hancock, Root, Fremont and Stillwater; C at New York city, Neversink, Goshen, Saratoga, Half moon and Montgomery; D at Saratoga, Montgomery, New York city, Schenectady and Root; E at Saratoga, Goshen, Kingston and New York city; F at Saratoga and New York city; G and K at New York city; H at New York city, Brooklyn, Williamsburg, Goshen and Watertown; I at New York city, Brooklyn, Alberg, Goshen, Jamaica, Poughkeepsie, Tarrytown and Troy; L and M at New York city, Brooklyn, Jamaica, Goshen, Kingston, Plattsburg, Tarrytown, Troy and Schenectady.
The regiment left the State in 1864, by detachments, and served in the defenses of Washington, D. C., 22d Corps, from April, 1864; in the Provost Guard, Army of the Potomac, from June, 1864; at Washington, D. C., 22d Corps, from July 7, 1864; in the 4th Brigade, 1st Division, Cavalry, Army of Potomac, from August, 1864; in the 1st Brigade, 1st Division, Cavalry, from September, 1864; in the Army of the Shenandoah from October, 1864, and in the Cavalry Division, Army of West Virginia, from April, 1865.
Commanded by Lieut.-Col. Aaron Seeley, the regiment was honorably discharged, and mustered out, June 27, 1865, at Hart's island, New York harbor, having, during its service, lost by death, killed in action, 1 officer, 10 enlisted men; of wounds received in action, 6 enlisted men; of disease and other causes, 49 enlisted men; total, 1 officer, 65 enlisted men; aggregate, 66; of whom 7 enlisted men died in the hands of the enemy.