After finding all routes to Nohr blocked, you attempt to go through Wolfskin Peak, but must battle your way out.
Preparations Before the Battle
Flying units will help a lot in this battle because they will not be hampered by the terrain. However, the boss unit is strong against flying and mounted units, so keep that in mind.
Rout the Enemy
Your objective is to defeat all of the enemies. Many of the enemies here will drop items upon defeat.
There are several Dragon Veins in the map that will lower the stats of enemies units throughout the map for several turns.
All the enemies here are melee fighters that can't do ranged attacks, so you will not take damage if you attack at range.
Keaton is the boss unit, and he has the Beastbane skill, which makes him dangerous to your flying or mounted units.
After a while, reinforcements will come out of the forts.