III. No sooner had Octai subverted the northern empire of China, than he resolved to visit with his arms the most remote countries of the West. Fifteen hundred thousand Moguls and Tartars were inscribed on the military roll: of these the great khan selected a third, which he intrusted to the command of his nephew Batou, the son of Tuli; who reigned over his father's conquests to the north of the Caspian Sea. [264] After a festival of forty days, Batou set forwards on this great expedition; and such was the speed and ardor of his innumerable squadrons, than in less than six years they had measured a line of ninety degrees of longitude, a fourth part of the circumference of the globe. The great rivers of Asia and Europe, the Volga and Kama, the Don and Borysthenes, the Vistula and Danube, they either swam with their horses or passed on the ice, or traversed in leathern boats, which followed the camp, and transported their wagons and artillery. By the first victories of Batou, the remains of national freedom were eradicated in the immense plains of Turkestan and Kipzak. [27] In his rapid progress, he overran the kingdoms, as they are now styled, of Astracan and Cazan; and the troops which he detached towards Mount Caucasus explored the most secret recesses of Georgia and Circassia. The civil discord of the great dukes, or princes, of Russia, betrayed their country to the Tartars. They spread from Livonia to the Black Sea, and both Moscow and Kiow, the modern and the ancient capitals, were reduced to ashes; a temporary ruin, less fatal than the deep, and perhaps indelible, mark, which a servitude of two hundred years has imprinted on the character of the Russians. The Tartars ravaged with equal fury the countries which they hoped to possess, and those which they were hastening to leave. From the permanent conquest of Russia they made a deadly, though transient, inroad into the heart of Poland, and as far as the borders of Germany. The cities of Lublin and Cracow were obliterated: [271] they approached the shores of the Baltic; and in the battle of Lignitz they defeated the dukes of Silesia, the Polish palatines, and the great master of the Teutonic order, and filled nine sacks with the right ears of the slain. From Lignitz, the extreme point of their western march, they turned aside to the invasion of Hungary; and the presence or spirit of Batou inspired the host of five hundred thousand men: the Carpathian hills could not be long impervious to their divided columns; and their approach had been fondly disbelieved till it was irresistibly felt. The king, Bela the Fourth, assembled the military force of his counts and bishops; but he had alienated the nation by adopting a vagrant horde of forty thousand families of Comans, and these savage guests were provoked to revolt by the suspicion of treachery and the murder of their prince. The whole country north of the Danube was lost in a day, and depopulated in a summer; and the ruins of cities and