After Mengu-Timur died, rulers of the Golden Horde withdrew their support from Kaidu, the head of the House of Ögedei. Kaidu tried to restore his influence in the Golden Horde by sponsoring his own candidate Kobeleg against Bayan (r. 1299–1304), Khan of the White Horde. After taking military support from Toqta, Bayan asked help from the Yuan dynasty and the Ilkhanate to organize a unified attack on the Chagatai Khanate under the leadership of Kaidu and his number two Duwa. However, the Yuan court was unable to send quick military support.