Genghis Khan (/ˈɡɛŋɡɪs ˈkɑːn/ or /ˈdʒɛŋɡɪs ˈkɑːn/, Mongol: [tʃiŋɡɪs xaːŋ] ( listen); Traditional Mongolian: ᠴᠢᠩᠭᠢᠰ ᠬᠠᠭᠠᠨ; Chingis/Chinghis Khan; 1162? – 18 August 1227), born Temüjin, was the founder and Great Khan (emperor) of the Mongol Empire, which became the largest contiguous empire in history after his demise. He came to power by uniting many of the nomadic tribes of northeast Asia. After founding the Mongol Empire and being proclaimed "Genghis Khan," he started the Mongol invasions that resulted in the conquest of most of Eurasia. These included raids or invasions of the Kara-Khitan Khanate, Caucasus, Khwarezmid Empire, Western Xia and Jin dynasties. These campaigns were often accompanied by wholesale massacres of the civilian populations – especially in the Khwarezmian and Xia controlled lands. By the end of his life, the Mongol Empire occupied a substantial portion of Central Asia and China. Before Genghis Khan died, he assigned Ögedei Khan as his successor and split his empire into khanates among his sons and grandsons. He died in 1227 after defeating the Western Xia. He was buried in an unmarked grave somewhere in Mongolia at an unknown location. His descendants extended the Mongol Empire across most of Eurasia by conquering or creating vassal states out of all of modern-day China, Korea, the Caucasus, Central Asia, and substantial portions of modern Eastern Europe, Russia, and the Middle East. Many of these invasions repeated the earlier large-scale slaughters of local populations. As a result Genghis Khan and his empire have a fearsome reputation in local histories. Beyond his military accomplishments, Genghis Khan also advanced the Mongol Empire in other ways. He decreed the adoption of the Uyghur script as the Mongol Empire's writing system. He also practiced meritocracy and encouraged religious tolerance in the Mongol Empire while unifying the nomadic tribes of northeast Asia. Present-day Mongolians regard him as the founding father of Mongolia. Vilified throughout most of history for the brutality of his campaigns, Genghis Khan is also credited with bringing the Silk Road under one cohesive political environment. This increased communication and trade from Northeast Asia to Muslim Southwest Asia and Christian Europe, thus expanding the horizons of all three cultural areas. Due to the lack of contemporary written records, scant factual information exists about the early life of Temüjin. The few sources that provide insight into this period often conflict. Temüjin was born in 1155 or 1162 in Delüün Boldog, near Burkhan Khaldun mountain and the Onon and Kherlen rivers in modern-day northern Mongolia, not far from the current capital Ulaanbaatar. The Secret History of the Mongols reports that Temüjin was born with a blood clot grasped in his fist, a traditional sign that he was destined to become a great leader. He was the third-oldest son of his father Yesügei, a Khamag Mongol's major chief of the Kiyad and an ally of Toghrul Khan of the Kerait tribe, and the oldest son of his mother Hoelun. According to the Secret History, Temüjin was named after a Tatar chieftain, Temüjin-üge, whom his father had just captured. The name also suggests that they may have been descended from a family of blacksmiths. Yesukhei's clan was called Borjigin (Боржигин), and Hoelun was from the Olkhunut, the sub-lineage of the Onggirat tribe. Like other tribes, they were nomads. Because his father was a chieftain, as were his predecessors, Temüjin was of a noble background. This higher social standing made it easier to solicit help from and eventually consolidate the other Mongol tribes.After the defeat of the Khwarezmian Empire in 1220, Genghis Khan gathered his forces in Persia and Armenia to return to the Mongolian steppes. Under the suggestion of Subutai, the Mongol army was split into two forces. Genghis Khan led the main army on a raid through Afghanistan and northern India towards Mongolia, while another 20,000 (two tumen) contingent marched through the Caucasus and into Russia under generals Jebe and Subutai. They pushed deep into Armenia and Azerbaijan. The Mongols destroyed the kingdom of Georgia, sacked the Genoese trade-fortress of Caffa in Crimea and overwintered near the Black Sea. Heading home, Subutai's forces attacked the allied forces of the Cuman–Kipchaks and the poorly coordinated 80,000 Kievan Rus' troops led by Mstislav the Bold of Halych and Mstislav III of Kiev who went out to stop the Mongols' actions in the area. Subutai sent emissaries to the Slavic princes calling for a separate peace, but the emissaries were executed.

• published: 04 Dec 2014
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