This book presents a reconstruction of the socio-economic, ethnic, cultural, and political history of the Carpathian-Danubian area in the eighth and ninth centuries at a period when nomadic peoples from the east including the Bulgars, Avars, and Khazars migrated here. The work is based on a comprehensive analysis of narrative and archaeological sources including sites, artefacts, and goods in the basin bordered by the Tisza river in the west, the Danube in the south, and the Dniestr river in the east, covering swathes of modern-day Romania, Moldova, Ukraine, Serbia, and Hungary.