In the early 14th century, however, as the empire began to break up into its constituent parts, the Chaghatai territory also 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 Mawarannahr. Although he was not a descendant of Genghis, Timur became the de facto ruler of Mawarannahr and proceeded to conquer all of western Central Asia, Iran, the Caucasus, 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.