Central Asia by the early-to-mid X century. The Uyghurs are in dark red (and the Uzbeks in dark brown).
Uyghur, Uzbek, Persian
Uralic, Aramaic, Kypchak and Oghuz Turkic
Ethnic Groups main
Semi-nomadic Monarchy, Persian vassal
Sassanid rial (mostly Bukharan mint)
The Kingdom of the Uyghurs, also West Uyghuristan (Uyghur: Quri Qurighar, litterally West Western Land) was a vassal of the Sassanid empire in a revived foederati way so to fight against the Mordvin/Uralic Novgorodan Rus who was raiding the coast of the Caspian Sea.