In my country, barracks have "open days" (basically a weekend, once a year i think) where they would present all their clubs and invite external personnel to check out and participate (long-term, not only on those two days). I wanted to try fencing, so i went, and i finished joining the tabletop club (and fencing too). This is what brought me back to tabletops.

Then covid, moved to a city without any barracks close by, so i couldn't continue, but military definitely have tabletop rpgs (and they are very partial with those where battlemaps are easy to set up)