smbat

According to the Armenian writers, he formed a design of depopulating that part of Armenia which he had not ceded to the Romans, by making a general levy of all the males, and marching them off to the East, to fight against the Ephthalites; but the design did not prosper, since the Armenians carried all before them, and under their native leader, Smbat, the Bagratunian, conquered Hyrcania and Tabaristan, defeated repeatedly the Koushans and the Ephthalites, and even engaged with success the Great Khan of the Turks, who came to the support of his vassals at the head of an army consisting of 300.000 men.

George Rawlinson - The Seven Great Monarchies Of The Ancient Eastern World, Vol 7: The Sassanian or New Persian Empire : The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.

By the valor and conduct of Smbat, the Persian dominion was re-established in the north-eastern mountain region, from Mount Demavend to the Hindu Kush; the Koushans, Turks, and Ephthalitos were held in check; and the tide of barbarism, which had threatened to submerge the empire on this side, was effectually resisted and rolled back.

George Rawlinson - The Seven Great Monarchies Of The Ancient Eastern World, Vol 7: The Sassanian or New Persian Empire : The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.