Frederick served in Co. B 173rd Ohio Volunteer Infantry. He enlisted 8 September 1864. His rank was musician. He was discharged after 10 months of service with a disability: catarrh of head.
Note: 1880: Fred 34 years and Augusta 33 years were living on Fred's parents' farm in Walnut Township. Their children at that stage were Henry, eleven years; Lena eleven; and Fred nine. All of the children had been born in Ohio, whereas the adults had been born in Prussia.
1920: Fred and Augusta Klages, both 73 years, were living in Walnut Township where Fred was a farmer. (A special note says that both immigrated in 1862 and were naturalized in 1866.) Two sons, Kerry and Fred, Jr., both single, were also living with their parents.