Both these republics held possessions and establishments in the ports of Syria, which were often the scene of sanguinary conflicts between their citizens.  Alexandria was still largely frequented in the intervals of war as the great emporium of Indian wares, but the facilities afforded by the Mongol conquerors who now held the whole tract from the Persian Gulf to the shores of the Caspian and of the Black Sea, or nearly so, were beginning to give a great advantage to the caravan routes which debouched at the ports of Cilician Armenia in the Mediterranean and at Trebizond on the Euxine.  Tana (or Azov) had not as yet become the outlet of a similar traffic; the Venetians had apparently frequented to some extent the coast of the Crimea for local trade, but their rivals appear to have been in great measure excluded from this commerce, and the Genoese establishments which so long flourished on that coast, are first heard of some years after a Greek dynasty was again in possession of Constantinople.[1]

[Sidenote:  The various Mongol Sovereignties in Asia and Eastern Europe.]

10.  In Asia and Eastern Europe scarcely a dog might bark without Mongol leave, from the borders of Poland and the Gulf of Scanderoon to the Amur and the Yellow Sea.  The vast empire which Chinghiz had conquered still owned a nominally supreme head in the Great Kaan,[2] but practically it was splitting up into several great monarchies under the descendants of the four sons of Chinghiz, Juji, Chaghatai, Okkodai, and Tuli; and wars on a vast scale were already brewing between them.  Hulaku, third son of Tuli, and brother of two Great Kaans, Mangku and Kublai, had become practically independent as ruler of Persia, Babylonia, Mesopotamia, and Armenia, though he and his sons, and his sons’ sons, continued to stamp the name of the Great Kaan upon their coins, and to use the Chinese seals of state which he bestowed upon them.  The Seljukian Sultans of Iconium, whose dominion bore the proud title of Rum (Rome), were now but the struggling bondsmen of the Ilkhans.  The Armenian Hayton in his Cilician Kingdom had pledged a more frank allegiance to the Tartar, the enemy of his Moslem enemies.

Barka, son of Juji, the first ruling prince of the House of Chinghiz to turn Mahomedan, reigned on the steppes of the Volga, where a standing camp, which eventually became a great city under the name of Sarai, had been established by his brother and predecessor Batu.

The House of Chaghatai had settled upon the pastures of the Ili and the valley of the Jaxartes, and ruled the wealthy cities of Sogdiana.

Kaidu, the grandson of Okkodai who had been the successor of Chinghiz in the Kaanship, refused to acknowledge the transfer of the supreme authority to the House of Tuli, and was through the long life of Kublai a thorn in his side, perpetually keeping his north-western frontier in alarm.  His immediate authority was exercised over some part of what we should now call Eastern Turkestan and Southern Central Siberia; whilst his hordes of horsemen, force of character, and close neighbourhood brought the Khans of Chaghatai under his influence, and they generally acted in concert with him.