Advocates were strategists such as Gongsun Yan and Su Qin, who were finally cracked by Lian Heng. At that time, the State of Qin was the strongest among the Seven Heroes of the Warring States, which seriously threatened the survival of the six countries in Shandong. There were four wars to attack Qin, the first was the Chu-Wei-Han-Zhao war initiated by Gongsun Yan (3 18), the second was the Qi-Wei-Han war initiated by Qi Wang (296), and the third was Wei-Zhao-Chu initiated by Xin (247).
The alliance is not necessarily aimed at the State of Qin: 288 years ago, Chyi Chin was also called the Emperor of the East and the West, and Su Qin advised the King of Qi to give up his title. In the first 287 years, Li Dui of Zhao and Su Qin of Qi advocated that Qi, Zhao, Han, Wei and Chu should unite against Qin. As a result, Qi Xuan sent troops to destroy Song State, which aroused the dissatisfaction of other countries and pointed the finger at Qi State. In the first 286 years, Yan, Han, Zhao, Wei and Qin jointly attacked Qi, which almost perished.
According to Records of Historical Records and Biography of Su Qin, after Su Qin failed to lobby Qin Huiwen and Wang Lianheng, he turned to lobby the six countries to unite against Qin. Su Qin is in charge of the seals of the six prime ministers, but there are contradictions between countries. Su Qin was assassinated by Qi people for some reason, and the alliance collapsed.
Lian Heng was the diplomatic strategy of the Warring States Period. Corresponding to "combination". A strategist from "A Hundred Schools of Thought Contend". "everything is done wrong" said: "vertically, the United States attacks the strong with the weak; If you are horizontal, you will be weak if you are strong. " -[Warring States Period] Han Fei's "Han Fei Zi"
The origin of "vertical" and "horizontal" in the Warring States period is said to be because the "north-south direction" is called "vertical" and the "east-west direction" is called "horizontal". Qin is located in the west and the six countries are located in the east. The six-nation alliance is a north-south alliance, so it is called "alliance"; The six countries and the State of Qin formed an East-West alliance, hence the name "Lian Heng".