He was born in 1840/41. [source: date: 6 (20 in 1861)]
He enlisted and was mustered into service on 10 October 1861. He enlisted at Philadelphia, Pennsylvania. He was mustered in at Philadelphia, Pennsylvania, as a private in company I. [sources: 1, 6, 9, 10]
He fought at the Battle of Gettysburg. [source: 8]
On 30 December 1863, Sinex reported that he was one of 38 men who had less than fifteen months to serve who were unwilling to reenlist. On 2 January 1864, he was transferred to the 155th Pennsylvania Infantry, while those eligible were on veterans' leave. [sources: 2, 4, 10]
On 24 March 1864, Sinex requested that Isaac Tyson and Joseph Clowney replace Harry Angel and Armstrong, apparently on a detail. [source: 3]
He mustered out at Poplar Grove Church, Virginia, on 2 November 1864 , when his term expired. He was a private, in company I. [sources: 1, 5, 6, 7, 9, 10]
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 letter, Sinex to Marvin, 30 December 1863
3 letter, Sinex to Fowler, 24 March 1864
4 consolidated morning report, 91st PA, 2 January 1864 (Armstrong)
5 company I, register of men discharged (Charles Armstrong)
6 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 28 March 2005 (Chas. Armstrong)
7 consolidated morning report, 91st Pennsylvania, 3 November 1864 (Pvt Armstrong)
8 Pennsylvania Memorial, Gettysburg, Pennsylvania (Chas Armstrong)
9 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (Armstron, Charles)
10 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (Charles Armstrong)