Güyük Khan was the third of the “Great Khans” who ruled the Mongol Empire. He was the grandson of Genghis Khan, the conqueror who founded the Mongol Empire. Güyük underwent military training and served in the armies of both this father and his grandfather, playing a vital role in the empire’s expansion. He participated in the military expedition in Asia, Russia, and Central Europe. After the death of his father, he had to wait for almost 5 years to ascend to the throne. During this period, his mother, Toregene Khatun, served as the regent and ensured that all opposition against Güyük’s coronation was suppressed. Finally, he took to the throne on August 24, 1246. Although he was an able administrator, his rule came to an end within 2 years, on April 20, 1248.