Since I've stared playing EB (on both RTW and Alx exes), I've noticed how inactive rebel armies tend to be... Now, coming from vanilla Rome, I'm used to this, but based on what EB players have said on here, the rebels (I can't spell their in-game name) should in fact be rather agressive (besieging cities and stuff) and indeed, playing my new Casse campaign I just had a small 1/5 stack rebel army besiege one of my settlements (defended by a FM and a unit of lugoae), but this is the first time I've had this happen in EB, even though I've had far larger rebel armies spawn right outside (close enough to besiege the town without even moving) even less well defended cities (even in this very same Casse campaign), who have just stood around for a half-dozen seasons picking their noses untill my main army could come along and wipe them out...

So, what's going on here? Are the rebels in EB meant to be agressive and if so, what's wrong with them in my game? Or, are they not actually meant to be that agressive after all?