Crosby, John Schuyler was born on September 19, 1839 in Albany Company, New York, United States. Son of Clarkson Floyd and Angelica (Schuyler) Crosby.
Graduated from the University City of New York, 1855.
One of the first Americans to cross S. America from Valparaiso, Chili, to Montevidio, Uruguay, 1856. Second lieutenant United States of America, April 5, 1861. First lieutenant, August 28, 1861.
Captain a.-d.-c. vols., 19th Army Corps, June 3, 1863. Honorary mustered out of volunteer service, August, 1866. Lieutenant colonel and a.-d.-c. to Lieutenant General Sheridan, March 13, 1869-July 31, 1870.
Resigned, December 31, 1870. Bvtd.: captain, April 12, 1863, “for gallant and meritorious services in action at Fort Bisland, Louisiana”. Major, April 9, 1864, for same at battle of Pleasant Hill, Louisiana.
Lieutenant colonel, March 13, 1865, for same during the war. Also major and lieutenant colonel vols., February 15, 1865. Appointed by Governor Seymour, colonel 7th New York Heavy Artillery, 1863, but continued to serve on staff duty.
Served in Army of the Potomac during Civil War. Afterward in Indian campaigns as adjutant general with Generals Sheridan and Custer. Personally thanked by President Lincoln for carrying dispatches.
Governor Montana, 1882-1884. 1st assistant postmaster-general, 1883-1886. School commissioner, New York, 1889.