The Three Kingdoms of Korea include Goryeo which later became Gogureyo.
 924-927 AD) was forced to commit suicide and a puppet ruler, Kim Pu installed in his place with the reign name of Gyeongsun
 After the Unified Silla kingdom had ruled Korea alone from 668 AD, it slowly began to decline and the power vacuum this created led to several rebellious states rising up and taking on the old historical names of Korea's ancient kingdoms

