Disbandment
After many years of attacks the Dwarfs decided to abandon their settlements deeper underground. This ended the easy underground connection routes between their holds and caused them to be isolated. After this the kingdoms quickly fell into seperate clan states.
After many years of attacks the Dwarfs decided to abandon their settlements deeper underground. This ended the easy underground connection routes between their holds and caused them to be isolated. At first surface routes were attempted by the dwarfs but Giants controlling the surface regions there made surface travel difficult. After this event the kingdoms quickly fell into seperate clan states. All kinds of underground monstrosities were described in records of these attacks but an exact reason for the drastic decision is missing. What we do know is that the Dwarfs not only abandonned their settlements but often constructed several layers of walls to protect their higher positioned settlements. The Lower Realms in general were deemed too dangerous and only brave adventurers dared to travel through the few remaining tunnels into that place.