Original sentence: It was the prevailing religion of the Turks, Mongols, Hungarians, Xiongnu and possibly Huns, and the religion of the several Medieveal states: Göktürk Khaganate, Western Turkic Khaganate, Old Great Bulgaria, Danube Bulgaria, Volga Bulgaria and Eastern Tourkia (Khazaria)
Edited sentence: It was the prevailing religion of the Turks, Mongols, Hungarians, Xiongnu and possibly Huns, and the religion of the five ancient Turkic states: Göktürk Khaganate, Western Turkic Khaganate, Great Bulgaria, Bulgarian Empire, and Eastern Tourkia (Khazaria)