The wars with Champa plus the Mongols still left ??i Vi?t exhausted and bankrupt. The Tr?n household was subsequently overthrown by among its own courtroom officers, H??Quý Ly. H??Quý Ly forced the final Tr?n emperor to abdicate and assumed the throne in 1400. He improved the region identify to ??i Ngu and moved the capital to Tây ?ô, Western C