Yazdegerd II fought wars against which Central Asian people based in Bactria?
Yazdegerd II:  His reign was marked by wars against the Byzantine Empire in the west and the Hephthalite Empire in the east, as well as by his efforts and attempts to impose Zoroastrianism on the largest religious minority within the empire, namely the Christians. Hephthalite Empire: The Hephthalites (or Ephthalites) were a people of Central Asia who were militarily important circa 450-560.
i don't know