After
Qutluqshah's death in
Gilan, 1307, Chupan suddenly rose to be supreme commander of
Ilkhanate forces and later de facto ruler of Ilkhanate during
Abu Sa'id's reign. Abu Sa'id kept him in Georgia as viceroy. However, Abu Sa'id caught off-guard when both
Öz Beg Khan and
Yasa'ur invaded Ilkhanate in
Golden Horde-
Chagatai alliance, 1319. Chupan summoned his subordinate emirs, including Qurumshi and caught up to Abu Sa'id and defeated the Ozbeg on the shores of
Kura river. Chupan decided to punish the emirs who didn't came to the summoning. Qurumushi himself was sentenced to 100 blows by Chupan, which was insulting to him. It was when Qurumushi started to conspire a revolt. When Abu Sa'id left for his capital Qurumushi attacked his camp led by Toqmaq noyan, forced him to change sides. Chupan himself fled to his son
Hasan, who aided him with 500 men. Chupan's forces were crushed by Qurumushi's 20,000 men near
Lake Sevan, Chupan himself got away wounded. Later
Safavid authors claimed this was due to 'miraculous intercession' of
Safi al-Din Safawi. Qurumushi captured
Nakhchivan after the battle and started an alliance with fellow Kerait emir
Irinjin. Apart being both Keraites, Qurumushi and Irinjin were both related to ilkhan
Tekuder by marriage. Irinjin was already disgruntled by Chupan's dismissal of him from Anatolian viceroyalty, therefore he gladly agreed. While Abu Sa'id was gathering his forces in
Soltaniyeh, Qurumshi and Irinjin besieged
Tabriz, forcing its inhabitants to pay 70,000 dinars and give them provisions. Rebels later captured
Sarab,
Miyaneh and
Zanjan. Abu Sa'id's army were commanded by Taz, son of
Kitbuqa and Mamluk renegade Qara Sonqur. The sides fought a battle on 13 July 1319 in which Irinjin and Qurumushi were beaten. Qurumushi fled but captured by Khaja Badr al-Din Lu'lu' near the river Kur and sent to Soltaniyeh. The Georgian king
George V of Georgia supported the Il-Khanate in helping crush Qurumshi's revolt. == Trial and death ==