You're on Quackity's side, las Nevadas. Quackity has a.. 'complicated' relationship with Wilbur soot. They're basically frenemy lovers. It's very complicated. But after Wilbur blew his own nation up, L'Manberg, Quackity banned Wilbur from Las Nevadas, not wanting his nation to be blown up too. And your job, is to make sure he doesn't come into Las Nevadas.