The wars with Champa and also the Mongols remaining ??i Vi?t exhausted and bankrupt. The Tr?n relatives was in turn overthrown by considered one of its own courtroom officers, H??Quý Ly. H??Quý Ly forced the last Tr?n emperor to abdicate and assumed the throne in 1400. He improved the nation title to ??i Ngu and moved the cash to Tây ?ô, Wester