He wasn't dishonourably discharged. I think if he was, it might appear here.
https://www.navysite.de/crewlist/com...tartyear=1972#
Here's his boat:
https://en.wikipedia.org/wiki/USS_Tautog_(SSN-639)
Don't get me wrong -
Vendildo is an asshole. Even if he scrubbed shitters in the navy it would still be an honourable thing - it's just too bad he's fallen so far from that once honourable duty to become the asshole he is today.