During the Spring and Autumn Period, after the wars between the various vassal states, the number of many vassal states of the Zhou Dynasty plummeted, and although the Zhou royal family was still the nominal king, in fact, it had no power in name for a long time.
With the Yue King Goujian destroyed the state of Wu, the national strength became very strong, and many large countries in the Spring and Autumn Period, Qin, Jin, Qi, Yan, and Chu also survived, but in the early days of the Warring States, the strength of the Qin State was a relatively weak existence among these countries.
Later, the Jin State was divided and became the three kingdoms of Zhao, Wei and Han, known as the "Three Families of Jin" in history, because the Jin State was strong in the early Warring States period, even if it was divided into Zhao, Wei and Han, the strength of these three countries was still very strong, and they often joined forces to attack other countries.
Many large and small countries left from the Spring and Autumn Period to the Warring States Period, such as Yue, Shu, Lu, Zheng, Wei and other large and small countries, also survived with difficulty.
But after all, the strength of these countries is too different from the Seven Heroes of the Warring States, and in order to compete for hegemony, countless countries, large and small, eventually perished in the hands of the Seven Heroes.
The Seven Heroes of the Warring States Period are the seven countries of Qin, Chu, Qi, Yan, Zhao, Wei and Han, except for the Qin State, the remaining six countries are all in the east of the Kushan Mountain, so they are called the "Six Kingdoms of Shandong".
After the formation of the pattern of the Seven Heroes of the Warring States Period, Wei State, with the help of Li Kui's reforms, formed a powerful army by Wu Qi, which became the strongest, and formed an alliance with Korea and Zhao, faintly having a hegemonic situation.
However, due to the fact that Wei Wuhou listened to the villain's slander and lost trust in Wu Qi's suspicions everywhere, Wu Qi decided to defect to Chu after Wei Guoxin's death.
Wu Qi, who came to the state of Chu, was reused, and the king of Chu appointed him as Ling Yin, specializing in the reform of the politics and military of the state of Chu, and under Wu Qi's reforms, the state of Chu gradually became stronger.
During this period, Chen Guofei's surname Tian descendants replaced Qi Guo Jiang Xing and became Qi Hou, which is the so-called Tian Dynasty Qi.
And because of suspicion everywhere, the Wei State after the loss of Wu Qi broke down, and the relationship with Zhao was completely broken, and the alliance between Zhao, Wei, and Han was also completely broken.
In the state of Chu, because the king of Chu mourned the reuse of Wu Qi, the state of Chu gradually became stronger through the change, but with the death of the king of Chu mourning, Wu Qi was killed by the former nobles of the state of Chu, and Wu Qi's change in the state of Chu was also announced.
Subsequently, due to the success of the law change, the Qin State and the Qi State slowly rose and became a powerful country, the world was completely chaotic, and the competition for hegemony between the vassal states became more intense, and many classic wars and influential figures broke out at the same time.
At that time, Qin's most powerful opponent was the Qi State, which also succeeded in changing the law, and Qin used a plan to let Chu and Qi sever diplomatic relations, claiming that as long as diplomatic relations were severed, the 600 li territory of Chu would be returned.
But when Chu and Qi broke off diplomatic relations, Qin turned his face, claiming that the agreement was 6 li instead of 600 li, and Chu was angry and attacked Qin, and finally the generals were captured, and more than 80,000 Chu troops were killed, completely devastated.
Later, when the Qi State destroyed many small states, the national strength gradually became stronger, and the other vassal states were worried that the Zhao State was too strong, so the Qin State and the other five countries jointly sent troops to attack the Qi State.
During the war, the state of Qi also slowly lost its strength to compete with the state of Qin, and during this period, the Battle of Hangu Pass also broke out.
In the Battle of Hangu Pass, it was a war in which Zhao, Chu, Wei, Han, and Yan jointly attacked Qin, and it broke out due to Qin's continuous expansion and alliances, which threatened the interests of several other countries.
But these five countries always value their own interests, and no one wants to be the first bird, and in the end, in the war, the Chu and Yan states, which were the least affected, had a very negative attitude and even refused to send troops.
Only the three states of Wei, Zhao and Han went to war with Qin, and Qin was strong at that time and finally defeated the combined forces of Zhao, Wei and Han.
In the end, in this war, the Qin State captured the Korean generals and killed more than 80,000 Korean soldiers, such a powerful strength completely shocked the rest of the vassal states.
In the Battle of Yique, in order to open the passage of the Central Plains, Bai Qi led the Qin army to defeat Korea and Wei, and killed 240,000 Han and Wei allied forces.
In the Battle of Yanying, Bai Qi, the general of Qin, once again led his army to attack Chu, and this war directly captured the capital of Chu, further weakening the strength of Chu.
In the Battle of Shancheng, Fan Ju was forced to leave Wei because of persecution, came to Qin, and made a proposal to King Zhaoxiang of Qin, asking him to get close to Wei and Han first, and then threaten Chu and Zhao to force Qi to take the initiative to attach themselves to Qin.
When Qi took the initiative to attach itself to Qin, Qin could immediately send troops against Han and Wei, taking this opportunity to expand Qin's territory and weaken the power of other countries, and thus the Battle of Shancheng broke out.
After this battle, it also completely triggered the war between Qin and Zhao, and the famous Battle of Changping appeared.
In this battle, the general Lian Po of Zhao was defeated by Qin one after another, and Wang Yi led the Qin army and even beat the Zhao army to the beginning of fear of the Qin army, and the Zhao army had already lost its military morale.
Seeing this, Qin spread rumors everywhere, claiming that Lian Po had surrendered, and the Qin army was not afraid of Lian Po at all, only Zhao Kuo was afraid.
Because Zhao Kuo's father, Zhao Hao, once defeated the Qin State, so after the rumors came out, Zhao Kuo also bluntly said that the general of the Qin army, Wang Di, could only defeat Lian Po, but if he faced himself, he had no chance of winning, unless he fought in vain, he could have the qualifications to fight with him.
In the end, Zhao Kuo was appointed to meet the army of the enemy Qin, and the Qin State also quietly appointed Bai Qi as the commander, due to the repeated defeats of the Zhao State, and urgently needed a victory to stabilize the army's heart, Bai Qi seized this opportunity and set up an ambush for Zhao Kuo.
Bai first ordered the army to pretend to be defeated by Zhao Kuo's army and was forced to retreat, then Zhao Kuo was eager to win and pursued the Qin army, and Bai Qi had a force go around Zhao Kuo's rear.
In the end, under Bai Qi's strategy, Zhao Kuo was surrounded, and after holding on for more than 40 days, most of the soldiers in the army had already died and injured due to lack of food, injuries and diseases.
When the last few breakouts failed, Zhao Kuo was also killed by random arrows, and in the Zhao army, except for the youngest few hundred soldiers who were released back to Zhao, in the Battle of Changping, Qin killed more than 400,000 Zhao soldiers and other soldiers.
After the Battle of Changping, the form of the Warring States began to change, and after years of war, the Qin State was completely strong, and no country was the opponent of the Qin State, and the Qin State unified the whole country, and it was only a matter of time.