Cullens vs. Volturi

Prolog

We all know Edward left Bella in new moon. Yet not all know the classified information of the Volturi. When Edward left Bella she was changed into a vampire, a vampire that feeds off of humans, part of the Volturi. The Cullens are fed up and challenge the Volturi to war concerning the vampire royalty throne. Little do they know Bella is part of their enemies. Will they proceed with the attack? Whose side will Bella choose? What if the Cullens do win and banned killing humans, punishable by death, and Bella chooses to eat humans, what will they do?