Military action
Valders starting invasion war.
The Valders started to invade the tribes of Dreor north of them. It took all the Valders to build up in ten years before they could move on to the offensive. According to their own writings, they see their invasion as a just cause, because of the raids from the neighboring tribes. After 5 years of fighting, the Dreor was shattered or dead in a ditch. The remainder of 5 years they had trouble to establish a border. The giants of the north constantly resisted, and also the dwarfs. Highlanders and Shinobi were able to flee over the mountain pass before the valders had invaded all of Eldar.