Berke left no sons, so Batu's grandson Mengu-Timur was nominated by Kublai and succeeded his uncle Berke. However, Mengu-Timur secretly supported the Ögedeid prince Kaidu against Kublai and the Ilkhanate. After the defeat of Ghiyas-ud-din Baraq, a peace treaty was concluded in 1267 granting one-third of Transoxiana to Kaidu and Mengu-Timur. In 1268, when a group of princes operating in Central Asia on Kublai's behalf mutinied and arrested two sons of the Qaghan (Great Khan), they sent them to Mengu-Timur. One of them, Nomoghan, favorite of Kublai, was located in the Crimea. Mengu-Timur might have struggled with Hulagu's successor Abagha for a brief period of time, but the Great Khan Kublai forced them to sign a peace treaty. He was allowed to take his share in Persia. Independently from the Khan, Nogai expressed his desire to ally with Baibars in 1271. Despite the fact that he was proposing a joint attack on the Ilkhanate with the Mamluks of Egypt, Mengu-Timur congratulated Abagha when Baraq was defeated by the Ilkhan in 1270.