He was born in 1840/41. [sources: date: 2 (20 in 1841)]
He enlisted and was mustered into service on 10 October 1861. He enlisted at Philadelphia, Pennsylvania. He was mustered in as a private, at Philadelphia, Pennsylvania. He served as a private in company D. [sources: 1, 2]
He deserted on 19 July 1862, at Alexandria, Virginia. [sources: 1, 2]
Assuming that he is related to John Blazo (D) is tempting. Assuming that the Charles Blazo from Parsonfield Maine would come to Philadelphia to enlist seems extravagant--but the presence of a John Blazo in Parsonfield is striking.
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) (Charles Blazo)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 8 Aug 2004 (Charles Blazo [rolls have 'Charles Blaza'])