Duke Wu of Yan was still reluctant to participate in the Dispute in the Central Plains, and the State of Yan may be in the midst of change and non-change

Different eras must have different histories. Different monarchs have different countries. During the period of Duke Wu of Yan, the State of Yan had already taken on a different look. For four or five hundred years, the Yan kingdom was silently stationed in the northeast for most of the time, and on the fringes of Kyushu, the country was always in a state of silence. Yan Wugong's father, Yan Zhaogong, had already made a more thorough change to the Yan kingdom, which already had at least five major counties and counties, Namenggu, Yuyang, Youbeiping, Liaoxi, and Liaodong, and even more had the Great Wall that ran across Hebei to the Korean Peninsula, and these areas would gradually become strategic places, and would be attacked by war in the next thousand years. In the era of Yan Wugong, this place was still quiet.

Between the lofty mountains and mountains, there are a large number of ethnic groups expelled by the Central Plains, who thrive here and gradually grow up. The princely states that brought them closest to the civilization of Middle-earth were the Yan Kingdom. Duke Wu of Yan was the 23rd monarch of the State of Yan, and like most monarchs of the State of Yan, Duke Wu of Yan may have held on to the heavy duty of garrisoning the border, without the frequent orders of the Son of Heaven or the absolute disputes in the Central Plains. The State of Yan has always followed the trajectory of independence, which is difficult for the central plains princes to pay attention to, and rarely participates in the affairs of the central plains. Dumping...

Even in the State of Qi and the State of Jin, which are the closest to the State of Yan, the external trend of national development rarely points to the State of Yan. Although this period did not resemble the later Warring States period, and did not form a kind of cross-regional super-large-scale war, even if there were almost no major wars such as the Battle of Chengpu that penetrated the east, west, south and north, more wars were still concentrated in a small area. The war of hegemony seems to have entered a stalemate period, with the State of Chu advancing vigorously to the north, the State of Jin vigorously going east, the State of Qi also trying to revive, and the states of Song Lu and Zheng Wei and other countries are eager to move. Yanguo is often not among them.

Throughout the Spring and Autumn Warring States period, and even extending to the more distant Western Zhou Dynasty, the figure of the Yan people was mainly active in the early and late periods, and in the middle of the hundreds of years, the Yan people rarely had wars, few civil strife, and few influential figures appeared. On the contrary, in the south, because of the Chu State, because of Wu Yue, there are always a few periods of history that are magnificent, and there are always some characters who stir people's heartstrings. Those things that are three-nation alliance, five-nation alliance, and eight-nation alliance are often not Yanguo. During the more than twenty years that Duke Wu of Yan ruled, this situation did not change.

Unlike the Qin and Chu states, in addition to fighting with each other during this period, those small princely states organized many multinational alliances, not only across thousands of mountains and rivers to the west to attack the Qin state, but also to the south to attack the Chu state, but there was not even a war against the Yan. This may be related to the policy that the Yan people have always pursued, that is, the Yan state is a pure princely state divided by Zhou Tianzi, which is beyond doubt. The Yan kingdom was also a good friend of the central plains princely states, which was beyond doubt. Even when the Jin state and the Qi state were vying for hegemony, the history books rarely appeared about the alliance between the two countries, and the Yan state still seemed to play an indispensable role.

However, the Yan people have set up counties since the time of Yan Zhaogong, which shows that they are still politically influenced by the nations, and the construction of the Great Wall shows that the defensive thinking and strategic system of the Yan people have gradually become complete, and the eastern line of the territory can be extended to the Korean Peninsula, which shows that although the Yan state had no right to speak in the south at that time, it was already an absolute hegemon in the land of Youzhou, where the mountains, lone bamboo and even the former Yin merchants had mostly become vassals of the Yan state. The Duke of Yanwu, on the other hand, was only to maintain the wealth and military strength accumulated by the previous generations of Yan monarchs, and the Yan kingdom may be in the middle of change and non-change.