He was 38 years old when he was enlisted (3).
He was a bonnet presser when he was enlisted (3).
He was 5 feet 7 inches tall, and had a light complexion, blue eyes, and dark hair (3).
He was enlisted and mustered into service on 9 December 1861 (1, 3). He was enlisted for three years, by Captain Gilbert, at Philadelphia, Pennsylvania (3). He served as a private in company G (1).
He was discharged at Philadelphia, Pennsylvania, on 10 December 1861, by order of Colonel Gregory, because he was intoxicated when he enlisted (1, 2, 3).
1 Bates, Samuel Penniman. History of Pennsylvania volunteers, 1861-5. Harrisburg: B. Singerly, state printer, 1869-71. 5 volumes. 'Ninety-first regiment', volume 3, pages 186-233. (In the roster)
2 company G, register of men discharged, #1 (John D Ackerman)
3 company G, descriptive roll, entry 24 (John D Ackerman)
[I did not find an entry for him in the index on <wwww.ancestry.com> to the pension index by name (searched September 2006)
[I did not find an entry for him in the Ancestry or Heritage Quest indices to the 1860 census (searched Jan 2008)]
[I did not find an entry for him in the Ancestry index to the 1890 veterans' census (but some entries had no identifying information) (searched Jan 2008)]