But, Bretonia and Liberty have an evac order on the Colonial Republic's ships, and will shoot on sight if they're found in the aforementioned houses' space.
So, the answer to this thread would be:
CR is not at war with bretonia, Liberty, Kusari or Rheinland.
And rulewise they can't attack BAF, KNF, LN or RM.
I'm eager to hear if allying with SCRA would be considered an unlawful action.