I’m not related to any member of this family.
You may wish to include a personal letter stating all info that you know.
Be sure to include any alternate spelling of the last name.
Online form allows you to request information from your or your relative's, military personnel record. This option is only available if you are the veteran or next of kin (surviving spouse that has not remarried, father, mother, son, daughter, sister, or brother). Otherwise you will need to send in the SF180. The link is http://www.archives.gov/research_room/vetrecs/http://www.archives.gov/veterans/military-service-records/ge...
Requesting Civil War – Army recordshttp://www.archives.gov/genealogy/military/civil-war/#mail