When I served in Japan and other Far East countries in late 50s/early 60s, a lot of men ‘fell in love’ with Japanese and or other Nationalities and wanted to get married.
Standard at the time for marriage was E5 and below needed permission to get married.
I had a Crypto Clearance and we were told that any ‘deep’ relationships with ‘Native Ladies’ would probably end up with losing ones Security Clearance.
It may not have ‘bothered’ 80% of the crew but those of us that NEEDED a clearance of one sort or another had to walk a ‘straighter’ line.
I would imagine a lot of the ‘new wave volunteers’ were not properly vetted etc, so a problem arises then and there.
We were told our security clearance was just like a credit rating— something you manage through your own choices and actions.