Civ splits

[Jesus Civs]

Is it possible to have schisms/splits within the game so that a civ creates two new sub-civs.

An idea I had was to split the Roman Empire into West and East after a certain year passed or a certain tech was discovered.

Can certain cities and units be allocated to the new sub-civs or does does it happen randomly.

There are many questions that can spring from this idea, but if anyone knows how you can "split" a civ mid-game, please let me know.

 

[Aranor]

You should check out Jdog's Barbarian civs, rebellion and AIAuto play mod. It incorporates some of these things that you are looking for. I think he also has some plans to expand it more into what you are looking at.