The Frat, separated by the easy pass of Deve-boyun from the valley of the Araxes (Aras), marks the natural line of communication between northern Persia and the West - a route followed by the nomad Turks, Mongols and Tatars on their way to the rich lands of Asia Minor.
After the danger from the Mongols had ceased, however, KalUn directed his energies towards capturing the last places that remained in the hands of the Franks, and proceeded to take Markab, Latakia, and Tripoli (April 26th, 1289).
The city of Bolgari was destroyed by the Mongols in 1238, and again by Tamerlane early in the following century, after which it served as the capital of the Khans (sovereign princes) of the Golden Horde of Mongols, and finally, in the second half of the 15th century it became a part of the principality of Kazan, and so eventually of Russia.
The Mongol rule was, however, not very heavy, the Mongols merely exacting tribute.
The latter marched into Asia Minor and defeated the Mongols in the bloody battle of Ablastan, the modern Albistan (1277); but, when he advanced farther to Caesarea, Mum ed-din Suleiman retired, hesitating to join him at the very moment of action.
He allied himself to the Mongols against the advance of the Egyptian sultan; but in 1268 he lost Antioch to Bibars, and when he died in 1275 he was only count of Tripoli.
The great lacustrine depression of the middle Volga was thus reached; and when the Mongol invasion of 1239-42 came, it encountered in the Oka basin a dense agricultural population with many fortified and wealthy towns - a population which the Mongols found they could conquer, indeed, but were unable to drive before them as they had done so many of the Turkish tribes.
His conquests to the west and north-west led him among the Mongols of the Caspian and to the banks of the Ural and the Volga; 1 The pastorals in this aspect are closer to Clemens Romanus than to Ignatius.
The Roman empire kept back the Persians and Parthians, but could not prevent a series of incursions by Avars, Huns, Bulgarians, and later by Mongols and Turks.
Farther south the best-known tribes are the Manchus, the Mongols proper, the Moguls and the Turks, all known under the name of Tatars, and to the ancients as Scythians, occupying from east to west the zone of Asia comprised between the 40th and 50th circles of N.