He served a total of four months (and some days) on active duty in Vietnam. Since no one will release either set of his discharge papers, we’ll never know. The first set, all evidence suggests, shows less than an honorable discharge. The second set was issued during the Carter years.
If you’re interested in JFK, go to Wintersoldier.com. It’s taken decades and $millions to unearth what little info there is.
You are correct as I recall. Wintersolder is where the FBI files were located.