Russia was 'the seat of the empire' of the Khazars, who drove the Bulgarians, descendants of the Huns, from the Don, one Section of them migia.tiug up thu Volga to found there the Bulgarian empire, and the remainder travelling towards the Danube.
The Turkish-Mongol races of the Pechenegs, Polovtsi, Uzes, &c., while in the S., along the Black Sea, was the empire of the Khazars, who had under their rule several Slav tribes, and perhaps also some of Finnish origin.
Georgia and Armenia were invaded and in great part occupied by the Khazars, and then for more than a thousand years the mountain fastnesses of this borderland between Europe and Asia were the refuge, or the restingplace, of successive waves of migration, as people after people and tribe after tribe was compelled to give way to the pressure of stronger races harassing them in the rear.
Trade with Persia and India, as also with the Khazars and the Russians, and undoubtedly with Biarmia (Urals), was, however, their chief occupation, their main riches being furs, leather, wool, nuts, wax and so on.
But the Khazars are an historic figure upon the borderland of Europe and Asia for at least 900 years (A.D.