Khazaria: the third superpower

In the 7th through 10th centuries, two super powers ruled Eastern Europe: Byzantium, "bulwark of Christendom in the east," and the Arab empire, but some historians name a third. Khazaria, a Jewish kingdom, played a crucial a part in the stemming of the Arab advance into Europe. (map)

Nicholas Soteri, of History Today, takes a look at Khazaria, a Jewish empire that extended its power from its homeland in the northern Caucasus to Eastern Europe and beyond.