Pretty much every Ammerman, Boggs, and Parsons (among others) from Centre County wraps back into my family tree. These are the two I know of where they were at the time.
My 3x's Great Grandfather
Joseph Ammerman
via SAC 47532264
Private, Company B, 18th Pennsylvania Cavalry. At war's end, the 18th Pennsylvania Cavalry and the 22nd Pennsylvania Cavalry were consolidated to form the 3rd Pennsylvania Provisional Cavalry. Joseph was mustered out with Company B, 3rd PA Provisional Cavalry on October 31, 1865. Born in Greene County, Pennsylvania. Filed for a pension on June 6, 1888, application number 658,527, certificate number 490,093. Wife Jemima Ammerman filed for a widow's pension on June 22, 1897, application number 657,144, certificate 453,952. Disability cited as rheumatism, unable to do manual labor in the 1890 Veteran's Census.
My understanding is this is one of his brothers. His Find A Grave has a picture of a mass grave stone not an individual.
David Ammerman
per Find A Grave:
Residence: Flemming Co, Centre Co,PA.
Enlistment Age-23. Laborer
Enlisted: Aug 11,1862 at Milesburg,PA. Private
Mustered into Co "B" 148th PA Infantry.
Listed, wounded Jul 2,1863 at Gettysburg, PA
Died of wounds at 1st Division,2nd Corps Hospital Gettysburg He was wounded in the fight for the Wheatfield, between 6:50 and 8:00 p.m. he was wounded near the present day Ayres Ave. He died at the 2nd Corps Hospital, and buried on the Jacob Schwartz's Farm. 2nd Corp Hospital was located near the end of the present day Hospital Road