He was 40 years old when he was enlisted (2).
He was a substitute (1, 2). He was mustered into service on 24 March 1865 (1). He was mustered in as a private, at Chambersburg, Pennsylvania (2). He served as a private in company C (1).
He mustered out with his company on 10 July 1865 (1, 2).
He died on 18 December 1887 (4).
On 27 [or 28] July 1890, his widow, Elizabeth Berger, applied successfully from Pennsylvania for a pension (3, 4).
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) (Frederick Berger)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 15 July 2004 (Frederick Berger)
3 pension index, by name (Frederick Berger)
4 pension index, by regiment, 91st PA Infantry, company C (Frederick Berger)
[possible match: 1870 US census Pennsylvania Luzerne Hazleton: microfilm series M593, film 1365, page 656 = 8 handwritten: Frederick Berger, 35, coal miner, born Hesse Cassel, m. Elizabeth (33), with Gertrude (9), Martha (8), Anna (6), and Martha (1)]
[possible match: 1880 US census Pennsylvania Luzerne Hazleton: microfilm series T9, film 1151, page 491 = 20 [?] D handwritten: Frederick Berger, 46, restaurant keeper, b. Hessen, m. Elizabeth (49), with Annie G (19), Elizabeth (17), Martha (16), Christiania (11), Mary (9), Emma C (5)]
[possible match: 1900 US census Pennsylvania Luzerne Hazleton: microfilm series T623, film 1431, page 195 = 2 B handwritten: Elizabeth Berger 69 (7 children 6 living, widow), Mary E (28) and Emma C (26)]
[I did not find an entry for him in Ancestry's index to the 1890 veterans' census (searched April 2007)]
[I did not find an entry for him in Rootsweb WorldConnect (accessed 6 December 2009)]
[I did not find an entry for him in Find-A-Grave (accessed 6 December 2009)]