The wars with Champa and also the Mongols remaining ??i Vi?t fatigued and bankrupt. The Tr?n family was subsequently overthrown by one of its have court officers, H??Quý Ly. H??Quý Ly compelled the last Tr?n emperor to abdicate and assumed the throne in 1400. He changed the place name to ??i Ngu and moved the cash to Tây ?ô, Western Money, now