The wars with Champa as well as Mongols still left ??i Vi?t fatigued and bankrupt. The Tr?n family was consequently overthrown by considered one of its individual court officers, H??Quý Ly. H??Quý Ly pressured the last Tr?n emperor to abdicate and assumed the throne in 1400. He improved the region name to ??i Ngu and moved the cash to Tây ?ô, W