I am new to Rome (but not the TW series) and have just begun a Julii long campaign. I am now wondering when I am allowed to attack my fellow romans, ie Brutii, Scipii and Rome itself. When I try I get the "You do not have enough popular support" message.

Do I need a certain support from the Plebs, from the Senate or am I only allowed to attack once the civil war begins (and if so, when does that begin and can I make it start sooner??)

/Lumumba