[Why] The Mongolian steppe tribes had long been mired in serious internal-strife fragmentation and suffered the division-and-massacre oppression of Jin, with people enduring war-torment threats. The tribes urgently needed a powerful iron-fisted leader. [What] In wind and rain of blood, Temujin gradually unified all the nomadic peoples of the Mongolian Plateau. At the source of the Onon River he convened the kurultai and was raised as Genghis Khan, formally founding the Mongol Empire. [Who] Genghis Khan Temujin possessed incomparable organizational nerve and supreme will, forging scattered tribes into the world's strongest military machine. The Four Heroes who followed him shook the entire Eurasian continent. [How] Temujin's rise wholly activated the mobility of nomadic cavalry and opened the wild-storm epic of sweeping Eurasia and reorganizing the Eurasian geopolitical pattern. It thoroughly changed the geopolitical landscape of world civilizational development.
Why
The historic event of Rise of Genghis Khan represents a key developmental peak of the Huaxia dynastic system. The nomadic horsemen reshaping Eurasian geopolitics. By establishing this moral or administrative benchmark, it continues to shape the structural and philosophical fabric of ancient Chinese statecraft.