A VERY GOOD idea!

[Myrddraal]

I believe the senate only attack if the enemy come within a certain distance of their cities (Rome) If you give them provinces, they will defend more agressively, but personally this seems like cheating to me.

I don't think they will ever expand by themselves

[pevergreen]

Thats true Myrddraal, they will not expand by themselves, but once they have taken some cities by accident (as happened on mine) they get more offensive...My campaign was buggy, (1.5) as the Brutii AI never go overwater and the Scipii take Sicily and never move...