Hi I am wanting to make a mod that makes the Rebels/Slave faction work as a minor faction.
So when a town rebel instead of the Rebels just sitting there with one army. They start to build buildings, more army's and also start to expand and invade other territories. I don't want them to be allied with anyone as well I want them to be really aggressive or as much as I can.

I am also working on making new units for the Rebels so can I add these units to them or not and can I change the name of the Rebel/Slave faction.

Just so you know i am intending to do a sort of 28 Days later type mod.
Is any of this possible and if so where would I start I am really new to modding so any help would be appreciated.