The Morning After the Storm
There is no guarantee of a successful outcome to the Wizard's Wars fought by the player magi. The magi must fight with every weapon in their arsenal and go to places they perhaps might not wish to go. If they repel the siege and force their rival magi to capitulate then their covenant is safe and all the territory lost to the invaders is theirs to retain as the spoils of war or return to those who can show a prior claim.
But if their enemies in the Trattato are too strong then they may lose their covenant and the saga must take a new direction, perhaps one in which the magi renew their political efforts to claim

back what is theirs.
The magi of the Trattato have clearly breached the Code and the protection they enjoy by working behind and alongside Casalmaggiore cannot protect them forever from the will of the Tribunal.