The Deep Crusade

The deep crusade was a battle by King Nuranmor to sieze the tunnels that were lost to demons and destroy the source of them.

Conditions
With trade from Alberich coming to a halt, the humans of Caledonia besieged the city, attempting to claim the mines and forges for themselves. King Nuranmor ordered gave his people 2 choices, go to the surface and live there, or follow him in to the depths to destroy the demons.

Siege
To secure the exit of those who chose to live on the surface, he armed all dwarves who could fight. The Caledonian forces on the surface were quickly defeated by the experienced and well equipped dwarven armies. Those who wanted to stay on the surface remained while Nuranmor and his army withdrew to Alberich to tear down the wall between them and the demons.

Crusade
The dwarven armies ventured into the depths, destorying the demons that they came across. The last that was heard from him was that they found a city filled with elves.