After Sima Zhao annexed Shu Han, why could the isolated Eastern Wu still hold out for 17 years?

Soochow has the Yangtze River natural insurance as a guarantee, easy to defend and difficult to attack. Sima Zhao's army lived in the north and was not accustomed to water warfare, and it took a long time to train a naval army to win the Eastern Wu.

Because Sima Zhao was not in a hurry to deal with it, after all, it would take a certain amount of time to digest it after destroying Shu Han, so he let it live for more than ten years.

Because the emaciated camel is bigger than the horse, after all, Dongwu has accumulated a strong force before, so even if Shu Han fails, Dongwu still has a certain amount of power.

Because of the natural danger of the Yangtze River, Soochow had a direction along the river at that time, so it was difficult to annex and needed to train a naval army, so Soochow persisted for 17 years.

is because Sima Zhao has been controlled by many people, and has been monitored by many people, and when the performance appeared, he was already boycotted by others.

As far as the first point is concerned, Sima Zhao has already taken precautions. In the battle of Wei to destroy Shu, although Sima Zhao handed over an army of 180,000 to Deng Ai and ordered the Zhonghui. However, Sima Zhao arranged Hu Lie, Wei Qian and other henchmen in the army of 180,000 to supervise Deng Ai and Zhong Hui.

For example, on the fifteenth day of the first month of the fifth year of Jingyuan (264), after Zhong Hui arrived in Chengdu, he decided to rebel. The next day, on the grounds that Empress Dowager Guo was mourning, he invited Hu Lie and other generals to the Shu court, took the opportunity to put them under house arrest, and raised troops to rebel. At this time, all the soldiers only thought about the return of the class teacher, and there was a commotion inside and outside Chengdu, and people were very worried and afraid.

Zhong Hui left Wei Qian by his side to discuss the matter, and wrote "want to kill Hu Lie and others" on the wood chip to show Wei Qiang, but Wei Qian did not agree, and the two began to be suspicious of each other. In this context, when Wei Qian went to the toilet, he met Hu Lie's original general, Qiu Jian, and told him that he wanted him to spread the news to the army. And the Hengque Core became an important reason for the failure of the Zhong Society.

Because under Sima Zhao's long-term calculations, he has already thought of everything, and under his scheming, anyone who rebels in a short period of time is in vain.

Sima Yan did not attack Wu immediately after eliminating Shu Han, but trained the navy to prepare for the attack on Wu, so Eastern Wu was able to survive for 17 years.

Because there was a natural danger in Dongwu at that time, and the most important thing was that the national strength of Dongwu was far stronger than that of Shu Han at that time, Sun Quan was still more far-sighted than Liu Bei.

Because the Sima family seized power in Cao Wei, they needed to stabilize their internal contradictions, and it would take some time to digest after destroying Shu Han, so they didn't have time to manage Eastern Wu.

One. First of all, for Soochow, the reason why it can hold on for 17 years is inseparable from the geographical advantages of the Yangtze River. Among the three kingdoms of Wei, Shu and Wu, Wei far surpassed Shu Han and Eastern Wu in terms of population, number of soldiers, and economy.

As for Eastern Wu and Shu Han, an important reason why they can compete with the powerful Cao Wei is that there is danger to defend. As far as Shu Han is concerned, there is the danger of mountains and rivers, that is, the Shu road is difficult and dangerous, easy to defend and difficult to attack. As for the Eastern Wu established by Sun Quan, there is also a natural danger of the Yangtze River to defend, which is also an important reason for the victory of the Battle of Chibi.

In addition to the Yangtze River moat, for the later Soochow, there were also famous generals such as Lu Kang, which was also the foundation for it to stick to.

Two. Secondly, although Sima Zhao sent Zhong Hui, Deng Ai and other soldiers to eliminate Shu Han, Sima Zhao died in 265 AD, two years after the fall of Shu Han. According to Chen Shou's record in the "Chronicles of the Three Kingdoms", in the second year of Xianxi (265), Sima Zhao died of illness at the age of fifty-four and was buried in Chongyang Mausoleum.

A few months later, his son Sima Yan became emperor of Wei, established the Jin Dynasty, and posthumously honored Sima Zhao as Emperor Wen. Because of Sima Zhao's death, Sima Yan and other Sima clans' first priority was not to eliminate Eastern Wu, but to ensure its internal stability and prevent the resurgence of Cao Wei's forces. Even after Sima Yan successfully usurped the throne, he needed to maintain his internal unity first.

Three. Moreover, after the death of Sima Zhao, the Jin State, as a newly established dynasty, not only had to deal with its own problems and appease all forces, but also needed to appease the Shu Han that had just been occupied. For the Shu Kingdom, which has just been pacified, because of Liu Bei and Zhuge Liang's years of operation, they are naturally psychologically oriented towards Shu Han.

For example, when Zhuge Liang died, the people of Yizhou were very sad. Therefore, for the newly established Jin State, it is necessary to strengthen the pacification of Shu, and wait until it can fully control Shu, which is a good time to march on Eastern Wu. Otherwise, while using force against Eastern Wu, they will have to face the problem of the rebellion in Shudi, and the pressure on the Jin State will be great.

Four. Finally, for the historical stage of the Three Kingdoms, although the three families of Wei, Shu and Wu competed for hegemony, it attracted everyone's attention. However, for the three countries of Wei, Shu and Wu, almost all of them are facing the problem of border ethnic minorities, and it is not as good as Shu Han to conquer Mengshu in the southwest.

As far as the Jin State is concerned, the Xianbei people in the north are an important threat. For the successive Central Plains dynasties, the nomads in the north were a formidable enemy. In order to fight against the Xianbei forces, the Western Jin Dynasty did spend huge manpower and force.

As a result, Sima Yan's use of troops in the north is also an important reason why Sun Hao of Eastern Wu can survive for a long time.

Because Shu Han's military strength and land area were not strong at that time, destroying Shu Han could enhance its own strength!

If you attack Shu Han, you don't need too long to prepare, but if you attack Xianqing Soochow, it will inevitably take too long to build ships and train sailors. For Sima Zhao, there is no doubt that he hopes to achieve the goal of eliminating the Shu and Wu sides before his death, so as to lay a good foundation for Sima Yan to establish the Western Jin Dynasty. Therefore, based on the above reasons, considering this, Sima Zhao decisively launched the battle of Wei to destroy Shu in August 263 AD.

I think the main reason is that Shuhan has a developed economy, convenient transportation, and the most important thing is the result of abundant natural resources.

Because the strength of Shu Han is the weakest among the Three Kingdoms, it is easier for Shu to attack than Eastern Wu, so destroy Shu Han first.

Because although Shu Han has the advantage of geographical type, it is easy to defend and difficult to attack, but after a long period of Northern Expedition by Zhuge Liang and Jiang Wei, the country has been exhausted, and the people do not want to resist, so they will choose to attack Shu Han first.

I think the main reason is the weak strength of Shu Han, and the result of Shu Han's convenient transportation and developed economy.

Because the national strength of Shu Han is very weak, Liu Chan does not have good governance skills, and the combat effectiveness of the army is also very poor, so it is easier to fight than Shu Han of Eastern Wu.