Our earliest information about the Ephthalites comes from the Chinese chronicles, in which it is stated that they were originally a tribe of the great Yue-Chi, living to the north of the Great Wall, and in subjection to the Jwen-Jwen, as were also the Turks at one time.
(Kobad), being driven out of Persia, took refuge with the Ephthalites, and recovered his throne with the assistance of their khan, whose daughter he had married, but subsequently he engaged in prolonged hostilities with them.
The Persians were not quit of the Ephthalites until 557 when Chosroes Anushirwan destroyed their power with the assistance of the Turks, who now make their first appearance in western Asia.
About a year after this he died (c. 540), and shortly afterwards the Ephthalites collapsed under the attacks of the Turks.
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