Quest for Sky and Orc displacement

Population Migration / Travel

The dwarves displaces the orcs from the darklands to the surface.

https://pathfinderwiki.com/wiki/Quest_for_Sky   As the dwarves begun what would later be dubbed their Quest for Sky, they drove the orcs out of the Darklands in front of them. It is unknown if they intended to displace the orcs, along with many other Darkland native species but the dwarves now say it was unwitting.