included into the Samanid State. Later, Transoxiana saw the incursion of the Turkic-ruled Karakhanids, as well as the Seljuks (Sultan Sanjar) and Kara-Khitans. The Mongol conquest under Genghis Khan during the 13th century would bring about a change to the region. The Mongol invasion of Central Asia led to the displacement of some of the Iranian-speaking people of the region, their culture and heritage being superseded by that of the Mongolian-Turkic peoples who came thereafter. The invasions of Bukhara, Samarkand, Urgench and others resulted in mass murders and unprecedented destruction, such as portions of Khwarezmia being completely razed. Following the death of Genghis Khan in 1227, his empire was divided among his four sons and his family members. Despite the potential for serious fragmentation, the Mongol law of the Mongol Empire maintained orderly succession for several more generations, and control of most of Transoxiana stayed in the hands of the direct descendants of Chagatai Khan, the second son of Genghis Khan. Orderly succession, prosperity, and internal peace prevailed in the Chaghatai lands, and the Mongol Empire as a whole remained a strong and united kingdom (Golden Horde). During this period, most of present Uzbekistan was part of the Chagatai Khanate except Khwarezm was part of the Golden Horde. After the decline of the Golden Horde, Khwarezm was briefly ruled by the Sufi Dynasty until Timur's conquest of it in 1388. Sufids rules Khwarezm as vassals of alternatively Timurids, Golden Horde and Uzbek Khanate until Persian occupation in 1510. In the early 14th century, however, as the empire began to break up into its constituent parts, the Chaghatai territory was disrupted as the princes of various tribal groups competed for influence. One tribal chieftain, Timur (Tamerlane), emerged from these struggles in the 1380s as the dominant force in Transoxiana. Although he was not a descendant of Genghis Khan, Timur became the de facto ruler of Transoxiana and proceeded to conquer all of western Central Asia, Iran, the Caucasus, Mesopotamia, Asia Minor, and the southern steppe region north of the Aral Sea. He also invaded Russia before dying during an invasion of China in 1405. Timur was known for his extreme brutality and his conquests were accompanied by genocidal massacres in the cities he occupied. Timur initiated the last flowering of Transoxiana by gathering together numerous artisans and scholars from the vast lands he had conquered into his capital, Samarkand, thus imbuing