I support our armed forces in all its forms - active, reserve, guard - and also the various private, nonprofit organizations that work on their behalf (24 year veteran myself). That said, this creep used his position to coerce his officers & senior enlisted to join. Typical ‘RAT pressure tactic.
I love a scandal as much as anyone, especially with a “D” after the name— but this seems like a pretty mild one. If all he did was pass out material in a staff meeting and say “hey this organization works to help protect the guard and out benefits and I am running for xyz, how about joining and supporting me” It sounds like somebody is getting even for something the Col did to piss them off. If he threatened their efficiency report, promotion opportunity or a job opportunity then hang him, but this stuff goes on all the time.