One of Kublai's first successes was against an ally of Ariq in northwestern China, from whom he captured food supplies intended for Ariq's army. He also drove Ariq supporters out of their homes in several towns. Ariq's attempts to attack Kublai's territory in southwestern China was turned away by Kublai's Chinese allies, whom he rewarded handsomely with gifts of silk and silver and with administrative positions.
Ariq's allies abandoned him, except for one: Aighu of the Chagatai Khanate (Chagatai was a son of Genghis Khan; Alghu was a grandson of Chagatai). Ariq named Alghu head of the Chagatai Khanate after the previous khan died, and the Chagatai Khanate became an important source of supplies for Ariq's army.
In 1261, Ariq and Kublai's armies met in battle, during which Ariq called for a retreat. Ten days later he returned and engaged a small contingent of Kublai's army, but could not achieve victory. By this time, Kublai's army had been occupying much of Mongolia. Ariq asked for help from Alghu, but Alghu saw that the victor of the civil war was likely to be Kublai, and changed allegiance.
Back in southern China, a rebellion took place that required Kublai to take his main force to quell it. With the immediate threat of Kublai gone, Ariq chose to attack his once-ally, Alghu. Ariq's attack on the Chagatai Khanate disillusioned several of his supporters. Ürüng, son of the previous Grand Khan Möngke, had been an ally, but he left Ariq and pledged his loyalty to Kublai instead.
Ariq, running out of allies, and lacking resources to feed and arm an army, turned himself over to Kublai in 1264 at Shangdu (also known as Xanadu), ending four years of hostility. Ariq was imprisoned and ignored by Kublai for an entire year.
Kublai purged the government of officials who were loyal to Ariq, executing some. He called a kurultai to decide what Ariq's fate should be and to officially make himself Grand Khan. Of the four Khanates of Genghis Khan's four sons, none of the others attended this kurultai called by the Toluid Khanate. Two of the khanates were fighting each other, and the Ögedei Khanate was still angry that the Grand Khan position had been maneuvered away from them years earlier.
Kublai would have to deal with other internal threats from those who did not fully accept his role as Grand Khan. Although the four khanates would have ties of trade and culture, they no longer united for military purposes. A united Mongolian Empire was no longer possible.
Ariq Böke died of unknown causes while still in prison, in 1266.
Kublai saw soon that his influence on the other khanates was limited, though not non-existent. Tomorrow we'll see his turn to making China his empire.
