Forty-year old P. Mark De Zeng enlisted with the 67th New York, 1st Long Island Volunteers at Brooklyn on May 24, 1861. He was mustered in as Major on June 24, 1861.
Major De Zeng was discharged on August 30, 1862.
Information provided by American Civil War Research Database
Photo provided by the U.S. Army War College, Carlisle PA
