I have made a campaign that replaces the rebels faction with Galatia. All their lands are now controlled by the slaves faction except for of course Galatia. Their treasury has also been moved there, and the happiness bonus from the governors building has been reduced. I haven't given terrae incognita to the slaves to avoid screwing with the campaign scripting, but it has no treasury now and is only garrisoned by a peltast unit, so it shouldn't affect gameplay too much. To run use the edited batch file, with has assigned the letter m to Galatia.