The wars with Champa along with the Mongols still left ??i Vi?t fatigued and bankrupt. The Tr?n family members was in turn overthrown by one of its have court officers, H??Quý Ly. H??Quý Ly pressured the last Tr?n emperor to abdicate and assumed the throne in 1400. He changed the nation name to ??i Ngu and moved the capital to Tây ?ô, Western M