Potentially interested in joining. I'm thinking of playing a loose faction of nomadic mercenaries based in hidden outposts along the asteroid belt. Mutineers, deserters, pirates, hardscrabble belters driven to desperation, soldiers of fallen states, gypsie-corporation exiles, freelancers, all forming roving flotillas along the Belt serving the highest bidder. And posing a threat that even the Inner Sphere powers have to respect due to many of their leaders being former elite captains and crews that took very heavy firepower with them as they escaped the destruction of the war by going independent.
But with the right incentive and the right price, they could be on your side instead.