Agreed, that would be an easier way of doing it Trachmyr
And BlueMage I think the Homeworld would only join the rebellion if it was extremeily unhappy. Otherwise if the Homeworld broke off then that would be a trigger in an of itself.
Also, it has been suggested be Suicide_Junkie that the amount of planets braking off in the event of civil war should be in proportion to the size of the entire empire. I agree with him. Large empires loosing up to half and splitting into possibly more than two new empires, and small empires lossing only a small x percent.
What are everyone elses thoughts on this?