In more than 50 years, Genghis Khan and his successors have successively wiped out more than 40 countries, conquered more than 720 ethnic groups, wiped out more than 0/000 million troops of various countries and conquered 600 million people of all ethnic groups, thus establishing the largest country in human history-the Mongolian Empire. In its stable period, its territory exceeded 35 million square kilometers, and in its peak period, its territory exceeded 45 million square kilometers, accounting for more than four-fifths of the whole human world at that time. Now the land area of Asia (including all islands) is only 44 million.