Arendelle was now peaceful, but Soran's war was not over because he had to teach Prince Hans a painful lesson.
Otherwise, Prince Hans would threaten the west coast. Soran did not want to see another threat. As long as Prince Hans' fleet was wiped out, it would be almost impossible for him to threaten Soran's rule of the west coast in a short time. It took time, energy, and wealth to build a fleet. Soran could only relax after crippling the navy of the southern islands. Then, his pirate leaders would be able to control the trade routes.
South coast - Outer islands.
South coast - Eastern continent.
South coast - Arendelle.
