The Veteran's Administration offers a wonderful service for families of deceased veterans who want something significant for their records or suitable for framing.
Presidential Memorial Certificates bearing the current president's signature can be ordered by the next of kin or direct descendant of any deceased, honorably discharged veteran. More than one certificate may be ordered for family members. The form to submit is available on the link above.
In addition to the above, if you do not know the exact location of a veteran's grave you can search on line using the gravesite locator.
For members and veterans of the armed forces who are of Scottish descent there is an organization that is both rewarding and fun: Scottish American Military Society (SAMS). Many U. S. Soldiers and veterans prefer the SAMS membership to one with their specific clan at gatherings and games because of their pride in the military service.
"It is in truth not for glory, nor riches, nor honours that we are fighting, but for freedom - for that alone, which no good man gives up but with life itself."
Declaration of Arbroath, Scotland, 1320