we know that there are 4 roman factions. and that in the end you will have to fight 3 of them to become an emperor.
that means that in the end the 3 roman factions will be allied agains you.
my question is => before this happens what kind of a relationship will romans have?
will it be

a) like catholics in MTW => the pope (senate) will incourage other catholic (roman) factions to fight you if you attack a roman first. and that's as deeps as it goes. so if you are at war with the Greeks the other roman factions couldn't care less.


b) senate war is a roman war => if a faction declares war on the senate, or the senate declares a war on the faction, then all roman factions are automaticly at war with that faction. However, if you are at war with the greeks the other roman faction don't have to help you.

c) one for all, all for one => if a faction declares war on any roman faction, or if a roman faction declares a war on a non roman faction, then all roman factions are automaticly at war with that faction.

d) like allies in MTW => you are allied to the other 3 roman factions, if war brakes out, then you are given an option to join it or stay neutral. (maybe even side with the barbarians)