Ariq Böke had earlier placed Chagatai's grandson Alghu as Chagatayid Khan, ruling Central Asia. He took control of Samarkand and Bukhara. When the Muslim elites and the Jochid retainers in Bukhara declared their loyalty to Berke, Alghu smashed the Golden Horde appanages in Khorazm. Alghu insisted Hulagu attack the Golden Horde; he accused Berke of purging his family in 1252. In Bukhara, he and Hulagu slaughtered all the retainers of the Golden Horde and reduced their families into slavery, sparing only the Great Khan Kublai's men. After Berke gave his allegiance to Kublai, Alghu declared war on Berke, seizing Otrar and Khorazm. While the left bank of Khorazm would eventually be retaken, Berke had lost control over Transoxiana. In 1264 Berke marched past Tiflis to fight against Hulagu's successor Abaqa, but he died en route.