Before revision: The son and heir of Asparuh Tervel becomes ruler in the beginning of 8th century when the Byzantine emperor Justinian II asked Tervel for assistance in recovering his throne, for which Tervel received the region Zagore from the Empire and was paid large quantities of gold.
After revision: The son and heir of Asparuh , Tervel, became ruler in the beginning of 8th century when the Byzantine emperor Justinian II asked Tervel for assistance in recovering his throne, for which Tervel received the region Zagore from the Empire and was paid large quantities of gold.