The following two excerpts were taken from Phisterer. The first is from Volume I, page 893 (in the records of officers for 8th Cavalry) and the second is from Volume V, page 3765 (in the records of officers for 151st Infantry)
SCHOEN, JOHN CHARLES, age 26 years; enrolled October 11, 1861, at Rochester to serve three years; mustered in as First Lieutenant, Company K, November 23, 1861; resigned, March 25, 1862, near Alexandria, Va.; subsequent service in 151st Infantry; commissioned First Lieutenant, December 11, 1861, with rank from November 27, 1861, original.
SCHOEN, JOHN CHARLES, late First Lieutenant, 8th Cavalry; enrolled September 10, 1862, at Rochester to serve three years; mustered in as First Lieutenant, Company E, this regiment, October 22, 1862; as Captain, February 26, 1864; killed in action, June 3, 1864, at Cold Harbor, Va.; commissioned First Lieutenant, November 10, 1862, with rank from September 10, 1862, original; Captain, February 6, 1864, with rank from December 30, 1863, vice Isaac Hallock, resigned.
See http://www.geocities.com/Pentagon/Quarters/1380/ for a web page for the 8th Cavalry. Schoen's name is listed in the newspaper article of November 21, 1861.
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