'Ali Khalil, also known as Ali-Sultan , was the khan

Khan (title)

Khan is an originally Altaic and subsequently Central Asian title for a sovereign or military ruler, widely used by medieval nomadic Turko-Mongol tribes living to the north of China. 'Khan' is also seen as a title in the Xianbei confederation for their chief between 283 and 289...

 (r.1342/1343) of the Chagatai Khanate

Chagatai Khanate

The Chagatai Khanate was a Turko-Mongol khanate that comprised the lands ruled by Chagatai Khan , second son of the Great Khan Genghis Khan, and his descendents and successors...

. He was a descendant of Qadan, son of the second Great Khan Ogedei.

'Ali attacked the ordo (palace) of Yesun Temur

Yesun Temur (Chagatai Khanate)

Yesun Temur was a pagan khan of Chagatai Khanate. He was a younger brother of Changshi Khan. His name literally means "Nine Iron" in the Mongolian language....

 and usurped the throne. He was the first and last one who had restored the Ogedeid authority over the Chagatai Khanate since the reigns of Kaidu

Kaidu

Kaidu was the leader of the House of Ogedei and the de facto khan of the Chagatai Khanate. He ruled part of modern-day Xinjiang and Central Asia during the 13th century, and actively opposed his uncle, Kublai Khan, who established the Yuan Dynasty in China until his death in 1301...

 and his son Chapar. During his reign, Islam

Islam

Islam . The most common are and .   : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~...

 fully absorbed the Chagatai Mongols

Mongols

Mongols ) are a Central-East Asian ethnic group that lives mainly in the countries of Mongolia, China, and Russia. In China, ethnic Mongols can be found mainly in the central north region of China such as Inner Mongolia...

 and 'Ali persecuted non-Muslim religions.