cring or assimilating the kindred Magyar, even as these had previously massacred and assimilated the mixed Scythians and Avars and Huns before them. From the Hungarian plain they would probably have made raids west and south as the Hungarians had done in the ninth century, the Avars in the seventh and eighth, and the Huns in the fifth. But in Asia the Mongols were fighting a stiff war of conquest against the Sung, and they were also raiding Persia and Asia Minor; Ogdai died suddenly, and in 1242 there was trouble about the succession, and recalled by this, the undefeated hosts of Mongols began to pour back across Hungary and Rumania towards the east.
To the great relief of Europe the dynastic troubles at Karakorum lasted for some years, and this vast new empire showed signs of splitting up. Mangu Khan became the Great Khan in 1251, and he nominated his brother Kublai Khan as Governor-General of China. Slowly but surely the entire Sung empire was subjugated, and as it was subjugated the eastern Mongols became more and more Chinese in their culture and methods. Tibet was invaded and devastated by Mangu, and Persia and Syria invaded in good earnest. Another brother of Mangu, Hulagu, was in command of this latter war. He turned his arms against the caliphate and captured Bagdad, in which city he perpetrated a massacre of the entire population. Bagdad was still the religious capital of Islam, and the Mongols had become bitterly hostile to the Moslems. This hostility exacerbated the natural discord of nomad and towns-man. In 1259 Mangu died, and in 1260—for it took the best part of a year for the Mongol leaders to gather from the extremities of this vast empire, from Hungary and Syria and Scind and China—Kublai was elected Great Khan. He was already deeply interested in Chinese affairs; he made his capital Pekin instead of Karakorum, and Persia, Syria, and Asia Minor became virtually independent under his brother Hulagu, while the hordes of Mongols in Russia and Asia next to Russia, and various smaller Mongol groups in Turkestan became also practically separate. Kublai died in 1294, and with his death even the titular supremacy of the Great Khan disappeared.
At the death of Kublai there was a main Mongol empire, with Pekin as its capital, including all China and Mongolia; there was
