The correct answer is by combining nomadic tribes which were of North east Asia.
Genghis Khan was the first and founder of great Khan for the empire of Mongol. After his death this empire was the largest contiguous in his history.
When Khan was proclaimed and founded the empire he then launched mongol invasions which conquered the great part of Eurasia.
The empire of Mongol occupied substantial area in China and Central Asia. Genghis Khan used Great Yasa to rule his people which included laws which were were talking about taxes, military, morals, procedures, court, and crime.
Mongol war horse was the center of Mongol life.
