 During the reign of King Xiang of Zhou, his half-brother Prince Dai (王子帶) twice attempted to usurp the throne in 649 BC and 635 BC, both times by conspiring with Quanrong to lay siege to the capital.King Xiang required military assistance by the vassal states to reinstate himself on both occasions, and was forced to increase their fiefs each time as commendations.This further weakened the image of the Eastern Zhou court in the eyes of the vassal states, and progressively relegated it to the status of a neglected figurehead.