early 13th century under Shah ʿAlāʾ al-Dīn Muhammad II (1200–1220). From 1218 to 1220, Genghis Khan conquered Central Asia including the Kara-Khitai Khanate, thus ending the Khwarezmid Empire. Sultan Muhammad died after retreating from the Mongols near the Caspian Sea, while his son Jalal ad-Din, after being defeated by Genghis Khan at the Battle of Indus, sought refuge with the Delhi Sultanate, and was later assassinated after various attempts to defeat the Mongols and the Seljuks. Khwarezm during the rule of Qunghrat dynasty (1360–1388) In 1360 there arose in Ḵwarazm an independent minor dynasty of Qunghrat Turks, the Ṣūfīs, but Solaymān Ṣūfī was crushed by Timur in 1388. The Islamization of Khwarazm was reflected in the creation of literary, scientific and religious works and in the translation of Arabic works into the Turkic language. In the Suleymaniye Library in Istanbul, the Koran is kept with an interlinear translation into Turkic, written in Khwarazm and dated (January – February 1363). The region of Khwarezm was split between the White Horde and Jagatai Khanate, and its rebuilt capital Gurganj (modern Kunya Urgench, "Old Gorganj" as opposed to the modern city of Urgench some distance away) again became one of the largest and most important trading centers in Central Asia. In the mid-14th century Khwarezm gained independence from the Golden Horde under the Sufid dynasty. However, Timur regarded Khwarezm as a rival to Samarkand, and over the course of five campaigns, destroyed Urganch in 1388. Khwarazm during the reign Shibanids – Arabshahids Control of the region was disputed by the Timurids and the Golden Horde, but in 1511 it passed to a new, local Uzbek dynasty, the ʿArabshahids. This, together with a shift in the course of the Amu-Darya, caused the center of Khwarezm to shift to Khiva, which became in the 16th century the capital of the Khanate of Khiva, ruled over by the dynasty of the Arabshahids. Khiva Khanate is the name of Khwarazm adopted in the Russian historical tradition during the period of its existence (1512–1920). The Khiva Khanate was one of the Uzbek khanates. The term "Khiva Khanate" was used for the state in Khwarazm that existed from the beginning of the 16th century until 1920. The term "Khiva Khanate" was not used by the locals, who used the name Khvarazm. In Russian sources the term Khiva Khanate began to be used from the 18th century. The rumors of