There remained only Volhynia and Gallicia, which also bowed under the Tartar yoke. With the exception of Novgorod and the northwest, Russia was in possession of the Yellow race. The Russian dukes who had escaped carried the tale to Western Europe which was soon in a state of alarm. The Emperor of Germany wrote to the other monarchs: (p. 068) "This is the moment to open the eyes of body and soul, now that the brave princes on whom we depended are dead or in slavery." The Pope called upon the Christian princes to take up arms. Meanwhile Bati continued his westward march and penetrated as far as Moravia, when he was recalled by the death of the second Tartar emperor. He withdrew to Russia and on the Volga built a city which he named Sarai--the Castle,--which became the capital of a Tartar empire extending from the Ural river and Caspian Sea to the mouth of the Danube, and is known as the Golden Horde. The first three successors of Genghis Khan are known as the Great Khans, and ruled over all the Tartars; but after Kublai Khan established himself in China, in 1260, the Golden Horde declared its independence. So long as Bati lived, this khanate was united and powerful, but after his death, in 1257, it gradually lost strength. In 1272, these Tartars became Mahomedans and spread that faith. The Golden Horde enjoyed another period of prosperity under the Khan Uzbeck. How did the Russians bear this blow? We have seen that Iaroslaf, the duke who had been expelled so many times from Novgorod, became Grand Duke of Souzdal. He found the country in Souzdal in ruins. Nothing was left of the towns and villages but charred remains; the inhabitants who had survived the Tartar massacres had fled into the forests. Iaroslaf's first work was to induce them to return and rebuild their homes. The Tartar general Bati heard of this and sent word to Iaroslaf to come to him. The grand duke dared not refuse. He went to Sarai (p. 069) on the Volga where Bati told him that he might continue as grand duke, but that it would be best for him to pay a visit to the great khan, who was then on the Amoor in the far eastern part of Asia. Iaroslaf agreed; he started on his long journey, and after many months of travel through deserts and wastes, he arrived at the headquarters of the Tartars. There he was compelled to kneel before Oktai, the successor of Genghis. It appears that some Russian boyards had preceded Iaroslaf hoping to secure favors from the khan, and that they accused the grand duke, but Oktai refused to listen to them. After some delay Iaroslaf was confirmed as grand duke, and permitted to return, but he died from exhaustion in the desert, in 1246. His remains were brought to Vladimir.