Silver Drinking Bowl with Handle 700s Avar The AvarsThe Avars were a nomadic tribe of mounted warriors from the Eurasian steppe. The Byzantine emperor Justinian negotiated with them in the sixth century to protect the Empires northern border along the Black Sea. Emboldened by their subjugation of numerous tribes, they unsuccessfully attempted to seize the Empires capital, Constantinople. They remained a scourge of both Byzantium and the Western kingdoms until Charlemagne defeated them through a series of campaigns in the 790s and early 800s.All the money and treasure that the Avars had been years amassing was seized, and no war in which the Franks have ever engaged.. brought them such riches and such booty. Up to that time the Avars had passed for a poor people, but so much gold and silver was found.. that one may well think that the Franks took justly from the Avars what the Avars had formerly taken unjustly from other nations.— Einhard (ca. 770-840), biographer of the Frankish rule