May I present the Junker Insurgents!
These junker civilians have taken up arms against what they see as another corrupt Earth like regime.
They do not wish to be a part of the system of corruption and back-handers that only serves to see the rich get richer and the poor oppressed good people get trodden on.
They will fight to keep the Junker community free from all evil Earth influence and make sure that the Junker people will remain free.
They don’t have the best kit, or the best training (none really to be fair) but they do have the home advantage and will excel as guerrilla fighters, using any and all methods to win their war on oppression.
Well that is the ‘official’ use for these figures.
I can’t see why they could not be militia, or rebels, or mercs or anything else really if you like…