The Battle of Yehuling was a decisive battle that took place in Yehuling (now Wanquan County, Hebei Province) in August 1211 (the third year of Jin Da'an and the sixth year of Genghis Khan in Mongolia) that determined the fate of both Mongolia and the Jin Dynasty. In this large-scale battle and the Huailai battle in 1213 (the first year of Jin Zhenyou and the eighth year of Genghis Khan in Mongolia), the Kingdom of Jin suffered successive defeats, which led to a coup d'etat in the Kingdom of Jin and accelerated its demise.
In this battle, Genghis Khan commanded an army of 100,000 to attack the 100,000 army in the middle of the 450,000 army of the Golden State. The Mongolian army won a great victory, and the Golden State almost lost all its elites. Since then, he has no ability to resist the Mongolian iron cavalry. The famous battles include the Battle of Badgers' Mouth and the Battle of Huihe Fort.
This battle not only determined the fate of the regimes of the two warring parties in Mongolia, but also affected the trend and pattern of Chinese history since then to a large extent.
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