In the 21st year of the Chengyuan Dynasty, due to the mistakes of the generals who defended Chakou Pass in Yizhou, the Munnar people entered the pass in large numbers and ran rampant. In Beiye, which is adjacent to the suburbs, general Pingxi sent troops to force Munnar troops to retreat. At the same time, Yuanzhou was suffering from internal and external troubles. In the capital city, Emperor Chengyuan was ill in bed, and the Queen Mother listened to politics behind the curtain. The position in the East Palace had been vacant for a long time, and all the princes were watching eagerly. It was at this time that the princesses of the Chu and Huo families entered the capital under the decree of the Queen Mother, triggering a war without gunpowder.
