The legendary Mongol conqueror Genghis Khan consolidated one of the largest and most popular empires in all history, striking fear and leaving devastation in his wake all across Asia and into Europe. With extraordinary toughness and organizational genius, he united the Mongol tribe into one nation and led them to victory over almost every opponent. Through their military brilliance, extreme discipline and innovative weaponry, by 1224 the Mongols had expanded their empire into modern-day Korea, China, Russia, the Middle East, India and Eastern Europe. The entire empire adhered to a legal code that allowed for justice to rule, commerce to flourish, all religions and races to be accepted, and order and peace to reign. After Genghis Khan's death, his vast territory was ruled by his sons and grandsons, who continued to amass more lands until the empire's demise in the 14th century.