During the Warring States period, the Yan state was almost defeated in many battles, so why could it be ranked among the "Seven Heroes of the Warring States"?

In the early western zhou dynasty, the old princely states had been divided, and the ancestors of the Yan state were the direct royal families of the Western Zhou, and from this we can see that the Yan state is not only old but also noble. Although the patriarchal system of the Warring States period has been fragmented, this old qualification cannot be ignored by anyone until bureaucratic politics is fully established! From the above old qualifications and noble status, we can also conclude that there are two reasons why the Yan Kingdom can be included in the Warring States 7 Xiong: because the Yan Kingdom is the descendant of zhao gong.

At that time, the Yan state also carried out reforms, but the strength was used fiercely, resulting in internal divisions within the ruling layer of the Yan state. Both the reformers and the conservatives hoped to get the aid of the State of Qi, and the State of Qi bet on both sides, and finally attacked the capital of the State of Yan and washed the Yan royal family in blood. In addition, since King Zhaoxiang of Qin, the State of Yan has always been a model for the distant and close attack of the State of Qin, and many of the actions of the State of Yan have followed the State of Qin and become the younger brother of the State of Qin. So his sense of presence is even lower.

During the reign of King Zhao of Yan, the State of Yan led a large army of Qin Kai to attack Eastern Hu in the north, and won a great victory, capturing a vast area of Liaodong, and even extending south of the present-day Yalu River, the State of Yan successively established the counties of Yuyang, Youbeiping, Liaoxi, and Liaodong in the vast new territory, and the State of Yan surpassed the four kingdoms of Zhao Qi and Yue Wei in terms of territory, second only to Qin Chu, ranking third among the nations.

In 222 BC (the thirty-third year of King Xi of Yan), the Qin government sent Wang Ben to lead an army to attack Liaodong, capturing King Xi of Yan, and the State of Yan fell. Qin set up Yuyang County, Youbeiping County, Liaoxi County, and Liaodong County in Yandi.