In history, Sun Quan finally decided to take action against Guan Yu, not only because he could not sit idly by and watch the expansion of Liu Bei's group, but also because the attitude of Guan Yu and Liu Bei and others was also a big reason.

However, Guan Yu didn't trust Sun Quan and others, but at this point, Guan Yu was finally fooled by Lu Meng, Lu Xun and others, and transferred away the troops that were originally stationed in Jingzhou, so that Sun Quan had a chance.

【Marriage】

After Guan Yu sat in Jingzhou, the relationship between him and Sun Quan was quite bad, which was one of the reasons why Sun Quan finally decided to crusade against Guan Yu.

At first, Sun Quan once sent someone to propose to Guan Yu's daughter for his son, but Guan Yu not only refused to marry, but also insulted the envoy, so Sun Quan was very angry.

In addition, according to the "Dictionary", Yu surrounded Fan, the right to send an envoy to ask for help, the envoy Mo Sujin, and sent the master to kill Yu first. Yu was angry that he was drowning late, and he had to wait for the ban, so he scolded: "Raccoon dog dares, if Fan Cheng is pulled, I can't destroy your evil!" "When the right hears it, he knows that he despises himself, and the pseudo-handwritten letter is Xie Yu, and he is allowed to go to himself.

It can be seen that Guan Yu's attitude towards Sun Quan at that time was very bad, and he did not give the Jiangdong boss any face, which offended Sun Quan very badly, which also made Sun Quan finally make up his mind to get rid of Guan Yu.

Sun Quan was ready to marry Guan Yu at that time also had corresponding political considerations, after the demarcation of Xiangshui, although Sun Quan seized the three counties from Liu Bei, but at the same time offended Liu Bei's group, Sun Quan wanted to marry Guan Yu at this time, mainly to repair the relationship between Sun and Liu Alliance, after all, Sun Quan had already welcomed Mrs. Sun back to Jiangdong at that time, and Sun Quan also had his own careful thoughts about doing so.

Now there is a view that Guan Yu should not refuse to marry Sun Quan at that time, even if the alliance breaks down in the future, Guan Yu can learn from Sun Quan and take his daughter back, but this view is very one-sided, lacks political common sense, and thinks about marriage too simply.

Because the marriage between Sun Quan and Liu Bei and the marriage between Sun Quan and Guan Yu is not a concept at all, Liu Bei is the boss, but Guan Yu is not! Sun Quan and Guan Yu became relatives after they got married, Guan Yu and Liu Bei had no kinship at that time, if Guan Yu rashly agreed to the marriage, let Liu Bei think, Sun Quan's marriage proposal itself is honey with poison.

But having said that, Guan Yu may not have taken these into account at that time, it may be because of simple unhappiness that he rejected Sun Quan's proposal, after all, the three counties seized by Sun Quan were all entrusted to Guan Yu by Liu Bei, and Guan Yu probably did not forget the humiliation of losing the land of the three counties, and speaking of Sun Quan's relatives, Guan Yu has the most direct and profound influence should be Mrs. Sun, you can make up for it, Guan Yu heard Sun Quan's envoy propose marriage, and remembered what kind of person Sun Quan's sister Mrs. Sun was, Then he thought about what Sun Quan's son might be like, and then naturally scolded.

In the "Chronicles of the Three Kingdoms: The Biography of Guan Yu", the record of this matter is "The right to send an envoy to Suo Yunu", using the word "Suo", it is likely that Sun Quan's attitude on this matter may not be very good at that time, and Guan Yu may also have this reason for being provoked and scolded.

But there is no doubt that from a political point of view, Guan Yu should not do this 100%, even if he refuses to marry Sun Quan, he should give Sun Quan a step, so later Sun Quan sent troops to attack Guan Yu, Guan Yu can be said to deserve it.

[Guan Yu who was fooled]

Historically, Guan Yu had enough vigilance and defense against Jiangdong, but unfortunately, even Guan Gong couldn't stand the fooling of Lu Meng, Lu Xun and others one by one, and finally Guan Yu transferred away the troops originally stationed in Jingzhou, giving Lu Meng and Lu Xun an opportunity.

Earlier, after Lu Meng replaced Lu Su as the commander of the eastern and western lines of Jiangxi, although he wanted to eliminate Guan Yu and seize Jingzhou, on the surface, he redoubled his hospitality to Guan Yu and showed kindness to him, which was better than Lu Su, a pro-Liu party, to Guan Yu. Later, Lu Meng saw that Guan Yu was afraid of himself, and took the initiative to invite the sick to lead the troops back to Jiangdong.

After Lü Meng retreated to Jiangdong, the commander of the Western Front was temporarily replaced by a blue-faced little white scholar Lu Xun, but this was just an illusion, in fact, Lu Xun and Lü Meng were also an out-and-out big fool.

At that time, after Lu Xun arrived at Lukou, he wrote to Guan Yu and said: "In the past, you were expected to observe the situation of the other party and act, command the army according to the law, and win a complete victory with a light move, what a noble majesty!" The enemy country has suffered a defeat, and our alliance is advantageous, and we applaud when we hear the good news of your victory, and we want you to complete the work of sweeping the world, and assist the court to revitalize the discipline. Recently, I, a foolish man, have been sent to come here to admire your grace and desire to receive your useful teachings. ”

He also said: "Yu Ban and others were captured for you, and they admired and admired you from near and far, thinking that the general's merits will last forever, even if the Duke of Jin Wen went out to Chengpu and the Marquis of Huaiyin sought to capture the Zhao State, he failed to surpass the general's exploits." I heard that Xu Huang and others are stationed with a small number of cavalry to spy on your movements. Cao Cao, a cunning enemy, resented by his defeat and would not think of danger, feared that he would secretly add troops and horses in order to achieve his ambitions. Although his army has been fighting for too long, there are still some fierce generals. According to the art of war, the ancients were doubly vigilant after the victory of the army, hoping that the general would take measures in many ways to ensure his complete victory. I am a scholar and a dull scholar, and I am ashamed that I am not up to the post, and I am very glad to be a neighbor of the general, and I admire your prestige and virtue, and I am willing to confide in you what I think, and what I say may not be in line with your strategy, but I can still see my feelings. If you're interested, you'll know what it means. ”

Guan Yu saw that Lu Xun's letter contained the meaning of modesty and attachment, and he was very happy and stable, and there was no longer any place to guard, so he transferred the troops originally stationed in Jingzhou to the front line in Jingzhou.

In this way, Guan Yunchang, who was famous for a lifetime, was finally fooled by Lu Meng and Lu Xun.

Of course, the reason why Lu Meng, Lu Xun and others were able to successfully fool Guan Yu was because their acting skills were too good and they didn't let Guan Yu know through, and on the other hand, because Guan Yu was already insufficient in military strength and couldn't do both.

As mentioned above, Guan Yu's military strength under his command at that time was relatively limited, and Xiangyang and Fancheng were guarded by Cao's army, easy to defend and difficult to attack, Guan Yu's troops to attack the two cities were not sufficient, and then Cao Cao continued to send troops to rescue, Guan Yu had to divide his troops again in order to deal with these reinforcements, so that Guan Yu's troops were even more scarce, although Guan Yu expanded the army after the first big victory, but also mostly weak recruits and unstable troops, quantitative but not qualitative, In this case, if Guan Yu doesn't want to give up halfway, he urgently needs support from the rear, otherwise it will be difficult for him to further open up the situation, and the longer he delays, the more disadvantageous it will be to Guan Yu.

In this sense, even if Lu Meng and Lu Xun did not make a move, Guan Yu might have to transfer the army that was originally used to guard against Sun Quan in the later stage, because Guan Yu himself did not have many options.