It is the Tatars who have given to the Russians the name of Mongols, to which the Tatars themselves have but a questionable right. In any case the title is not applicable to the true Russians, who have at most but a drop or two of Mongol blood in their veins, and less of Tatar than the Spaniards have of Moorish or Arab. At the same time with the process of absorption and assimilation of the Finnish element, another process has for centuries been going on--an inverse process of secretion and elimination of the Tatar and Moslem elements which Russia found herself unable to assimilate. After their submission a great number of Tatars left Russia, being unwilling to become the subjects of the infidels whose masters they had been. Before the progress of Christianity they spontaneously retreated to the lands still dominated by the law of the prophet. After the destruction of the Khanates of Kazan and Astrakhan, they tended to concentrate in the Crimea and the neighbouring straits--in what up to the eighteenth century was known as Little Tartary; after the conquest of the Crimea by Catherine II they took their way still farther toward the empire of their Turkish brethren. Even in our own time, after the war of Sebastopol and after the conquest of the Caucasus, the emigration of the Tatars and the Nogaians began again on an enormous scale, together with that of the Circassians. In the Crimea the Tatar population, already diminished by one-half in the time of Catherine II, is to-day scarcely one-fifth of what it was at the time of the annexation to Russia. The introduction of obligatory military service in the year 1874 drove them out in large numbers. By defeat and voluntary exile have the Tatars been reduced to insignificant groups in a country where, formerly, they reigned for centuries--in some parts of which even they were the sole inhabitants.[b] THE SLAVS