The ribbon rack you have there is interesting. You have a WWII vet (American campaign, WWII Victory, Army of occupation) who also has a Armed Forces Expeditionary medal (not a lot to go on there since it was awarded at several places) and the Viet Nam service medal. To get from WWII to Viet Nam, you had to make a detour through the Korean War time frame. Even if you didn't go to Korea, one still would have gotten the National defense medal (lower left) since it was given to all service members from June 1950 - July 1954. It was awarded again (and you would get one of those little bronze stars) in January 1961 through August 1974 for Viet Nam. The Viet Nam Service medal, however, was awarded for all who served in Viet Nam from 1958 through 1975. That would mean, to be in WWII, have the Viet Nam service medal BUT NOT have a bronze star on the National Defense medal you would have to be in the service from sometime during 1945 or earlier to, at the latest, 1961.
See the story those things can tell you?!