The short lived nation in darkfall

In the darkfall world, the NIthron conquered the Agon whereas it was a short-lived nation. They built their own empire and led a simple life for a period of time. However, glory time never last long. The second empire lacking of experience and authority was too talentless to control the country thus it took apart into many realms. The separate region was engaged in vying with each other for a long time. They started battles in order to gain recourses and territory as much as possible. The disappearance of the Nithron out of a clear sky is still a secret now. No exact reason has been put forward till now.