Correct. The importance of Jingzhou to Western Shu: First of all, The Biography of the Three Kingdoms * Wu * Lu Su and The Biography of the Three Kingdoms * Wu * Wu Zhu recorded the first encounter between Lu Su and Sun Quan respectively. The two of them talked for n days and nights and were very happy. Lu Su put forward the strategy of "three points in the world" (earlier than Zhuge Liang's "Long Zhong Dui"), which is called "Right Deviation". Three points are Liu Biao, Sun Quan and Cao Cao. Among them, the importance of Jingzhou is put forward. Furthermore, Zhou Yu's policy of "the world is divided into two" put forward by Sun Quan was recorded in The Three Kingdoms * Wu * Zhou Yu, The Three Kingdoms * Wu * Gan Ning, The Three Kingdoms * Wu Zhu and The Story of the Three Kingdoms * Wu * Sun Yu Chuan (after the Red Cliff, occupied by Sun Quan) (when Liu Bei occupied four counties in Jingnan). The general content is "Baonan County" (there is no mention of destroying Liu Bei first. I really don't know what Zhou Yu was thinking at that time. Can you go to Shu without worrying about Liu Bei? ), KouShuChuan (Liu Zhang, Zhang Lu), joint Mahan (refers to Ma Chao, Ma Wan, Han Sui three Liangzhou separatist forces); Stay in exile (referring to Sun Yu, the official general who was exiled at that time) and prepare to enter Shu. Yu is in the south of the town, and Sun Quan is guarding Jiangdong. "The importance of Jingzhou is also mentioned." West Shu: We know the famous "Longzhong Dui". It also mentioned "the importance of Jingzhou". In addition, the importance of Jingzhou to Liu Beijun is also reflected in the fact that Zhuge Liang realized that there was "Jing Yi" in Longzhong, and he waited for an opportunity to launch a "two-way attack on Cao" to recover the two capitals (Chang 'an and Luoyang). The ultimate goal of Longzhong Dui is to recover Kyoto and have a place in the Central Plains. It is also for the Shu-Han government to have a "military base" (Jingzhou). It also strengthened the "gateway" of the Shu-Han region. The reason for renting Nanjun, the reason for not returning Nanjun, and the reason for seizing Jingzhou by force First of all, the key point is that Liu Bei did not borrow "Jingzhou"; It can't be Jingzhou. After Chibi, Cao, Liu and Sun were divided. Liu Bei only borrowed "Nanjun (also known as Jiangling County)" (you can study the history book "The Story of the Three Kingdoms and Wu Zetian"), so you can't say that "Guan Yu lost Jingzhou". The correct statement is "Guan Yu lost to the confederate army." Or further, "Guan Yu lost Jiangnan or Jingnan." Nanjun died after Zhou Yu's death. Liu Bei came to Sun Quan to "rent" and "temporarily borrowed" it out. In order to gain the Jing Yi and realize the "Long-zhong-dui", Shu Han never returned the "Nanjun". At the same time, it also poses a serious threat to Sun Wu's occupation of the upper reaches of the Yangtze River. Geographically speaking, if we start from the belly of fish (Yong 'an Palace was built after the Yiling War, but it was renamed Yong 'an), we can directly attack Wu, Chaisang, Jiujiang and Jianye in the lower reaches of the Yangtze River. Seriously threaten the "Jiangdong regime." Therefore, it is imperative for Sun Wu to recapture "Nanjun" and even "Jiangnan or Jingnan area". Moreover, before Liu Bei entered Yizhou and Liu Bei captured Hanzhong, Sun Quan planned the action of "using troops twice" to "Jiangnan". However, the plan was aborted because Cao Cao and Wei Wudi worked hard in Jiangbei. On the other hand, Sun Quan's original intention of renting Nanjun was to use Liu Bei's army to "disperse" Cao Wei's forces, so as to consolidate Wu Dong's "Jiangbei Base" defense line and "sovereign position" in the lower reaches of the Yangtze River and prepare for threatening the eastern part of Cao Wei in the future. However, Sun Quan will never lend Nanjun to Liu Bei for a long time. Therefore, this stalemate between the two sides is inevitable, and it cannot be mediated in any case, and it will certainly not be resolved by peaceful means. Therefore, no matter who guards Jingzhou, the war with Sun Quan will happen sooner or later, and Guan Yu's innate weakness in character is quietly intensifying this contradiction' early'. Guan Yu's arrogance, kindness to foot soldiers, and contempt for literati (that is, intellectuals) (which can be investigated in the history book "The Story of the Three Kingdoms Guan Yu") are doomed that even if he has a "counselor" to supplement, he will not follow the strategy. Because of this, he was at odds with the "scholar group" headed by Zhuge Liang. In addition, the corner of his eye is so high that some commanders of the Shu-Han army guarding Jingnan have forged a "fast knot" with him (such as Pan Jun, Mi Fang, Fu Shiren, Liu Feng, Meng Da, etc. ), so when he was in trouble, not only did no one help him, but he even had a rebellion of "fishing in troubled waters". And despise Dongwu Group. It is wrong for Sun Quan to send messengers to propose marriage for his son. It was a "provocative war". I also want to humiliate Sun Quan and say, "The dog you gave birth to is not worthy of my tiger girl." Silence. So arrogant, who can compete in the world? Therefore, it provided sufficient and suitable soil for Lumeng to show his arrogant and rebellious plans. Coupled with Lu Xun's "false" compliment, Guan Yu lost all necessary vigilance and relaxed the internal management of Jingnan. Guan Yu Mang, who was attacking Xiangfan in front, did not know that Sun Wu's troops had attacked Jingnan. In the end, Guan Yu not only lost Jingnan, but also changed from a big star in the Central Plains to a captive with different skills in an instant, and paid a very heavy price. In fact, Sun Quan's original intention was not to "use force". But helpless people are too cunning, too unreasonable and too faithless (of course, this is the law of survival and pacification of "troubled times"). From Guiyang, Jiangxia and Changsha (before Liu Beizheng was in Hanzhong), he sent people to his post, but Guan Yu drove them away (you can refer to the history books "The History of the Three Kingdoms" and "The History of the Three Kingdoms * Wu * Wu"), and then he sent envoys to propose for his son (you can refer to the history books "The History of the Three Kingdoms" and "The History of the Three Kingdoms *"). It's really "hot ass sitting in a cold chair" and I have to be "rude." Guan Yu will never surrender (historical records show that he and Liu Bei are just brothers, not "Taoyuan sworn". For example, "riding a thousand miles alone"), having him only hinders and harms the interests of Wu Dong and Cao Wei, and having him in the "Liu Sun Alliance" can never achieve "the consolidation of the strength contrast between the two sides and thus realize the interests of * * *". So Guan Yu must die. Finally, the conclusion is drawn: "The Battle of Xiangfan" is an important battle of power transition in the Three Kingdoms era; It is one of the fulcrums to promote the "Three Kingdoms"; It is a dramatic change in the relationship between Cao Cao, Liu Bei and Sun Quan. It is the' collapse' of the Liu Sun Alliance; "Liu Sunwei" returned to "Cao Qiang Liu Sunwei" is the initial state. It is the final development result of irreconcilable contradiction between them. Sun Quan and Cao Cao were the beneficiaries of the battle of Xiangfan. The irreconcilable contradiction of Liu Beijun's internal political structure; Sun Quan took advantage of Guan Yu's weakness and the opportunity of "Long Hudou" between Cao Cao and Guan Yu. Cao Cao also took the opportunity to provoke the contradiction between Sun Quan and Liu Bei. Guan Yu's death was by no means a personal act, nor was it an alliance between Wei and Wu. Because this war "from the occurrence to the end" almost dispatched all the golden lineups of Liu, Cao and Sun. Coupled with the objective factors mentioned above, these multiple contradictions merged together, which contributed to Guan Yu's failure and led to his physical death. In this way, it seems unreasonable that Guan Yu died in whose hands!