From the perspective of diverting attention and seeking external environment, did Qin abandon Qi to send troops to help Yan cut Qi?

During the Warring States period, the princes competed for hegemony, and the strength changed; The relations between the vassal States were sometimes United, sometimes married and sometimes turned against each other. Among them, the relationship between Qin and Qi is very delicate, and most of these two countries are mainly United. Especially in the middle and late Warring States period, the relationship between Chyi Chin was even higher, and the whole State of Qi almost became a vassal of the State of Qin.

Qi supported Qin's policies and strategies, but turned a deaf ear to the fact that Qin launched a war of national subjugation. No matter what kind of war the members of the five Shandong countries suffered, Qi turned a deaf ear, as if the alliance with Qin had become the top priority of Qi, and it was the only thing that Qi needed to abide by.

In short, in the middle and late Warring States period, Qi never had a direct conflict with Qin, nor did it really stop Qin from advancing eastward, nor did it help any of the six Shandong countries. Qin did not directly wage war against Qi, but also regarded Qi as its most important ally and gave it many benefits. From this, we can also see the close relationship between the two countries and the importance of Qi to Qin.

For such allies, Qin should take foreign policy as the top priority. After all, the alliance with Qi is the key to break the six-nation alliance in Shandong and ensure the stability of the external development environment of Qin. But in the middle of the Warring States period, Qin joined forces with Yan and other countries to fight against Qi, and that war was not an ordinary small battle, but the biggest blow in the history of Qi.

In the middle of the war, Le Yi, a famous soldier of Yan State, led six armies to attack the capital of Qi State, and even forced the king of Qi to death at that time, making the old country of Qi State almost extinct. This is a more interesting point. Since Qi is an important ally of Qin, it stands to reason that when Qi is faced with such a war, Qin should send troops to help, but why should it help Yan, which has no direct interest with it, to crusade against Qi?

This paper focuses on the analysis. Qi is an important ally of Qin. Why did Qin help Yan attack Qi? Let's take a look at the interests behind the invasion of Qi by Qin and Yan.

The first point is to seek a stable external development environment for our country; In fact, although Qin also sent troops to participate in the war, the army of Qin was not the main force, but only symbolic, because Qin was actually strong at that time, and in most cases it was targeted by six Shandong countries, and the external development environment was not very stable.

In this stall, Qin urgently needs a country to divert the attention of other vassal States for it to ensure its stable development. Only by shifting the goals of the major vassal States to other countries can Qin have a chance to breathe. After all, Qin had just succeeded to the throne at that time, and the whole country had just suffered chaos in three places. The six Shandong countries also took this opportunity to launch a joint war.