Question: Yazdegerd II fought wars against which Central Asian people based in Bactria?
Sentence (from "Hephthalite Empire"): They were part of the four major "Hunic" states known collectively as Xionites or "Hunas", being preceeded by the Kidarites, and succeeded by the Alchon Huns and lastly the Nezak Huns.
Relevant evidence: No