Sun Wu, the ancestor of Chen Guojun, fled to Qi because of civil strife, and later became a doctor in Qi. Because of his outstanding military exploits, Sun Wu was made a grandson. Later, Sun Wu came to Wu from Qi, and was recommended by Wu Zixu to He Lv, the king of Wu, to become the general of Wu.
Wu Zixu is a native of Chu, and his father is the teacher of Prince Chu, the son of King Ping. Because of being framed, both father and brother were killed by King Chu Ping, while Wu Zixu fled to Wu with the prince and his son, and was valued by King He Lv. Wu Zixu and Sun Wu began to assist He Lv, the king of Wu, and became the overlord of a generation.
He Lv, the king of Wu, began to move westward after he had a certain strength, competing with Chu for the Jianghuai Valley. Wu joined forces with Cai and Tang to attack Chu. At first, Wu Jun defeated Chu in the Battle of Baiju. Later, in the Battle of Qingfa, Wu Jun defeated Chu, and then Wu Jun defeated Shen Yinxu, the general of Chu, and entered the capital of Chu.
Before Wu Jun invaded Chu, Zhao Chu escaped. After that, Wu Jun was defeated and Zhao Chu returned to Yingdu. There are three main reasons for Wu Jun's defeat:
A, Qin Jun reinforcements.
After Wu Zixu entered the capital of Chu, he dug up the body of King Chu Ping from the grave and flogged the body of the king of a country by 300. Wu Zixu was too excited about this revenge. Wu Zixu used to have a friend named Shen. In order to stop the behavior of the Wu people, Shen went to the State of Qin to ask for reinforcements and began to refuse, so Shen began to cry bitterly for seven days and seven nights, and finally moved the Qin people, so the king of Qin sent three hundred.
Second, the Chu people strongly resisted.
After the Wu people entered Chu, they did a series of bad things, which were not clearly stated in the history books, but it is conceivable that Wu Zixu whipped the body of the king of Chu alone, which made the Chu people unbearable. It is said that the harem of Chu was also insulted by Wu people, including Chu's property, which greatly inspired Chu people's fighting spirit. Besides, Chu has a vast territory, but the capital fell and the city was in the hands of Chu, so Chu people began to unite against Wu Jun.
Third, Wu civil strife.
When He Lv, the king of Wu, fought in Chu, Yue Wangyun, the old rival of Wu, often led troops to attack Wu. Wu's army fought in Chu, and the country was empty, and Wu Jun was broken. At this time, He Lv, the king of Wu, almost fled from Chu to Wu, trying to take advantage of Wu Jun's defeat and He Lv's absence from Wu to become king on his own.
This suddenly hit the soft underbelly of the prince He Lv. He had to quit Chu and return to Wu. At the same time, Qin Jun reinforcements and Chu troops also defeated Wu Jun, so several factors combined to lead to Wu Jun's defeat. Even with Wu Zixu and Sun Wu, He Lv, the king of Wu, could not be saved, so he had to retreat to Wu. This is the reason why Wu Jun, who owns Wu Zixu and Sun Wu, suffered a crushing defeat.