Conquest of Shu by Wei

Conquest of Shu by Wei
Part of the wars of the Three Kingdoms period
Conquest of Shu by Wei
Date c. September or October – November or December 263 Location Parts of Sichuan, Gansu and Shaanxi, China Result Cao Wei victory; Fall of Shu Han
Belligerents
Cao Wei	Shu Han
Commanders and leaders
Sima Zhao Zhong Hui Deng Ai Zhuge Xu	Liu Shan  Jiang Wei  Liao Hua  Zhuge Zhan †
Strength
160,000–180,000	90,000–102,000

Conquest of Shu by Wei
Traditional Chinese	魏ぎ滅めつ蜀しょく之これ戰せん 魏ぎ滅めつ漢かん之の戰たたかえ
Simplified Chinese	魏ぎ灭蜀之の战 魏ぎ灭汉之の战
Transcriptions Standard Mandarin Hanyu Pinyin Wèi Miè Shǔ Zhī Zhàn Wèi Miè Hàn Zhī Zhàn

The Conquest of Shu by Wei was a military campaign launched by the dynastic state of Cao Wei against its rival Shu Han in late 263 during the Three Kingdoms period of China. The campaign culminated in the fall of Shu Han and the tripartite equilibrium maintained in China for over 40 years since the end of the Eastern Han dynasty in 220. The conquest laid the foundation for an eventual reunified China under the Western Jin dynasty in 280.

Background

Further information: Zhuge Liang's Northern Expeditions and Jiang Wei's Northern Expeditions

The Three Kingdoms in 262, on the eve of the conquest of Shu by Wei.

Following the end of the Eastern Han dynasty in 220, three contending states emerged in China and fought for control over the territories of the former Han Empire. Among the three, Wei was the most powerful one in terms of military prowess, economic resources, manpower and geographical size. The other two, Shu and Wu, re-established their alliance against Wei in 223.

Between 228 and 234, the Shu regent Zhuge Liang, who advocated an aggressive foreign policy towards Wei, launched a series of five military campaigns (known as the "Northern Expeditions") to attack Wei territories in Yong and Liang provinces (covering parts of present-day Gansu and Shaanxi). The ultimate goal of the campaigns was to clear the path for Shu forces to capture the Wei capital, Luoyang, and restore the Han dynasty. All the campaigns turned out unsuccessful. After Zhuge Liang died in 234, his successors Jiang Wan and Fei Yi adopted a more defensive stance against Wei and focused on policies promoting internal development and stability in Shu. However, between 240 and 262, the Shu general Jiang Wei followed up on Zhuge Liang's legacy by launching another 11 military campaigns against Wei. However, each campaign was ultimately aborted due to inadequate food supplies, heavy losses on the battlefield, or other reasons. The campaigns not only severely depleted Shu's already limited resources and took a heavy toll on Shu's population, but also resulted in much public resentment against Jiang Wei.

In the meantime, the Wei general Sima Yi came to power after staging a successful coup d'état in 249. After his death in 251, his eldest son Sima Shi succeeded him as regent and consolidated power and control over the Wei government. In 254, Sima Shi deposed the Wei emperor Cao Fang, who tried to seize back power from him, and installed Cao Mao on the throne. Following Sima Shi's death in 255, his younger brother Sima Zhao became the new regent and continued to monopolise power in Wei. In 260, Cao Mao attempted to launch a coup d'état to overthrow Sima Zhao but failed and lost his life. Cao Huan, who succeeded Cao Mao as the Wei emperor, remained a puppet ruler under Sima Zhao's influence and control.

Wei strategic planning

Timeline of the Conquest of Shu by Wei
Approximate date range	Location	Event(s)
Winter 262	Luoyang, Henan	Sima Zhao announces his plan for the conquest of Shu to the Wei imperial court. He puts Zhong Hui in charge of military affairs in the Guanzhong region. Wei mobilises about 180,000 troops from its various provinces in preparation for the invasion of Shu.
Early 263	Zhugqu County, Gansu	Jiang Wei sends a warning to Chengdu that Wei appears to be preparing for an invasion of Shu. Huang Hao advises Liu Shan to ignore the warning.
Autumn 263	Luoyang, Henan	The Wei imperial court issues an edict outlining a three-pronged invasion of Shu: Zhong Hui, Deng Ai and Zhuge Xu would each lead an army to attack Shu from the eastern, western and central flanks respectively.
20 September – 19 October 263	Luoyang, Henan	The Wei armies set out from Luoyang.
	Shaanxi	Zhong Hui executes Xu Yi for failing his mission to oversee the construction of a road leading into Shu.
	Chenggu County and Mian County, Shaanxi	Zhong Hui orders Li Fu and Xun Kai to attack Lecheng and Hancheng counties respectively. Wang Han and Jiang Bin manage to hold their positions at Lecheng and Hancheng respectively.
	Ningqiang County, Shaanxi	Zhong Hui sends Hu Lie to attack Yang'an Pass. Jiang Shu surrenders to Hu Lie and assists him in conquering Yang'an Pass. Fu Qian is killed in action while defending the pass.
20 October – 17 November 263	Tianshui, Longxi County and Yuzhong County, Gansu, and Ankang, Shaanxi	Wei Commandery administrators Wang Qi, Qian Hong, Yang Xin and Liu Qin lead troops from their respective commanderies to join the invasion of Shu.
	Longnan and Wen County, Gansu	Liu Shan sends Liao Hua, and Zhang Yi and Dong Jue, to lead reinforcements to Tazhong and Yang'an Pass respectively. The Shu reinforcements stop at Yinping when they learn that Zhuge Xu's army is attacking Jianwei.
	Zhugqu County, Gansu	Deng Ai defeats Jiang Wei at Tazhong.
	Intersection of the Bailong and Jialing rivers	Jiang Wei attempts to retreat to Baishui but Yang Xin intercepts him at Qiangchuankou and defeats him.
	Wen County, Gansu	Jiang Wei heads north to Konghan Valley to bypass Zhuge Xu, who is blocking Wujie Bridge near Yinping. When Zhuge Xu lifts the blockade, Jiang Wei quickly turns back, crosses the bridge and moves on to Jiange. Zhuge Xu arrives too late to stop Jiang Wei.
	Jiange County, Sichuan	Jiang Wei, Liao Hua, Zhang Yi and Dong Jue retreat to Jiange. Zhong Hui attacks Jiange several times but fails to breach the Shu defences.
	Wen County, Gansu and Jiange County, Sichuan	Deng Ai comes up with the idea of taking a shortcut from Yinping to Mianzhu to bypass Jiange's defences and go straight for Chengdu. He asks Zhuge Xu to join him but the latter refuses. Zhong Hui frames Zhuge Xu for cowardice and seizes command of his army.
18 November – 17 December 263	Wen County, Gansu	Deng Ai leads an elite strike force through a shortcut bypassing Jiange and leading from Yinping to Chengdu.
	Jiangyou, Sichuan	Ma Miao, the Shu administrator of Jiangyou, surrenders to Deng Ai.
	Mianzhu, Sichuan	Deng Ai defeats Zhuge Zhan at Mianzhu. Zhuge Zhan, Zhuge Shang, Huang Chong, Li Qiu and Zhang Zun are killed in battle.
	Mianyang, Sichuan	Jiang Wei abandons Jiange and heads towards Ba Commandery. Zhong Hui moves to Fu County and orders Hu Lie, Tian Xu and Pang Hui to pursue Jiang Wei.
	Chengdu and Guanghan, Sichuan	Liu Shan sends Zhang Shao, Qiao Zhou and Deng Liang to bring his surrender document and imperial seal to Deng Ai at Luo County. He also instructs Zhang Jun and Jiang Xian to relay his orders for the rest of Shu to surrender to Wei. He sends Li Hu to order Jiang Wei to surrender to Zhong Hui at Fu County.
	Chengdu, Sichuan	Deng Ai and his forces occupy Chengdu.
	Mianyang, Sichuan	Jiang Wei surrenders to Zhong Hui at Fu County.

Wei decision to attack Shu

In 262, Sima Zhao noted that Shu was growing weak and lacking in resources after constantly waging war against Wei, so he wanted to launch a large-scale invasion of Shu to eliminate the threat of Shu. Among those he consulted, only Zhong Hui agreed that Wei was capable of conquering Shu. Zhong Hui then assisted Sima Zhao in formulating a strategy for the conquest of Shu.

Sima Zhao made an announcement to the Wei imperial court as follows:

"Since the Shouchun rebellions, we have not launched a military expedition for six years; we have trained our soldiers and repaired their armor, such that we may eliminate the two barbaric states. If we plan to conquer Wu, I estimate that the process of constructing ships and opening up waterways will take up more than 1,000 units of ten-thousand-manpower. In other words, we will need 100,000 labourers to work over a period of more than 100 days. Besides, the southern lands are humid, and our troops will surely fall victim to plague and disease. Therefore, I think we should conquer Shu first. Three years after that, we can make use of Shu's geographical advantage by sending our navy downstream along the river to attack Wu, while concurrently sending our army to invade Wu by land. It would be as easy as Jin conquering Yu and Guo, and Qin eliminating Han and Wei. According to our calculations, Shu has a 90,000-strong army, of which more than 40,000 troops guard Chengdu and the interior commanderies. This means they have fewer than 50,000 troops elsewhere. Presently, we can distract Jiang Wei at Tazhong and make him unable to deal with the situation to his east. We can then send our army through the Luo Valley where they are least defended, to seize control of Hanzhong. If the Shu forces remain in their forts and passes, they will be isolated from each other. We can send the bulk of our forces to conquer their cities and smaller detachments to seize their towns and villages. By then, they will have neither sufficient time nor manpower to guard Jiange and Yang'an Pass. At that point, with Liu Shan's ineptness as a ruler, with Shu's border defenses shattered, and with its people quivering with fear, the fall of Shu is inevitable."

The Wei general Deng Ai, who had been leading Wei forces to resist multiple Shu incursions along the Wei–Shu border since 255, voiced strong objections to the campaign against Shu. Sima Zhao worried that Deng Ai would embolden others to oppose the campaign as well, so he commissioned his registrar Shi Zuan (師し纂) as a major under Deng Ai and ordered him to "persuade" Deng Ai. Deng Ai then changed his mind and supported the campaign.

Wei's three-pronged invasion of Shu

In the winter of 262, Sima Zhao appointed Zhong Hui as General Who Guards the West (鎮西ちんぜい將軍しょうぐん) and granted him imperial authority to oversee military affairs in the Guanzhong region. The Wei government also mobilised about 180,000 troops from the various provinces throughout Wei in preparation for the invasion of Shu. At the same time, the Wei government also put Tang Zi in charge of overseeing the construction of warships in preparation for a future invasion of Wei's other rival state, Wu.

In the autumn of 263, the Wei imperial court issued an edict outlining a three-pronged invasion of Shu:

• Deng Ai would lead 30,000 troops through Gansong (甘あま松まつ; southeast of present-day Têwo County, Gansu) to attack Jiang Wei's position at Tazhong (沓くつ中ちゅう; northwest of present-day Zhugqu County, Gansu);
• Zhuge Xu would lead 30,000 troops to Wujie Bridge (武たけ街まち橋きょう; northwest of present-day Wen County, Gansu) to block Jiang Wei's retreat route;
• Zhong Hui would lead more than 100,000 troops to attack Shu via the Xie Valley (斜はす谷だに; southwest of present-day Mei County, Shaanxi);
  • Zhong Hui's subordinates, Li Fu (李り輔) and Hu Lie, would lead a detachment through the Luo Valley (駱谷; southwest of present-day Zhouzhi County, Shaanxi).
  • The Wei imperial court authorised Wei Guan to supervise Zhong Hui and Deng Ai's military operations. Wei Guan also held the appointment of an acting military judge under Zhong Hui, and had command of 1,000 troops.

Shu strategic planning

Changes in the Shu defences at Hanzhong

Previously, when the Shu general Wei Yan first took charge of guarding Hanzhong Commandery in 219, he borrowed the concept of "double gates" from the Yijing and deployed heavily armed troops at interlocking camps on the outskirts and exits of trails leading into Hanzhong. These camps were meant to obstruct and hold off any invading forces. During the Battle of Xingshi in 244, the Shu general Wang Ping used the same strategy to defend Hanzhong from a Wei invasion led by Cao Shuang.

Jiang Wei pointed out that Wei Yan's idea of the interlocking camps was useful for only defence and would not provide additional advantages. He proposed vacating the camps and moving all their troops and resources to the two fortresses of Hancheng (漢かん城じょう; east of present-day Mian County, Shaanxi) and Lecheng (樂らく城じょう; east of present-day Chenggu County, Shaanxi), which provided access the Hanzhong Plain. The idea was to lure the invaders to attack the fortresses, overstretch their supply lines, and wear them down through guerrilla-style attacks. Once the invaders decided to retreat, the defenders would seize the opportunity to launch an all-out counterattack and defeat them.

In 258, Jiang Wei ordered Hu Ji, Jiang Bin and Wang Han (王おう含), who oversaw Hanzhong's defences, to dismantle the interlocking camps and move their troops and resources to Hanshou (漢かん壽ことぶき; northeast of present-day Jiange County, Sichuan), Hancheng and Lecheng respectively. He also ordered the defence infrastructure to be strengthened at a number of locations around Hanzhong: Xi'an (西安しーあん), Jianwei (建たて威たけし), Wuwei (武たけ衛まもる), Shimen (石門せきもん), Wucheng (武たけ城しろ), Jianchang (建たて昌あきら) and Linyuan (臨遠).

Jiang Wei's early warning

In early 263, Jiang Wei wrote a memorial to the Shu emperor Liu Shan as follows:

"I heard that Zhong Hui has been mobilising troops in Guanzhong and appears to be preparing to launch an invasion. As a precautionary measure, I think we should send Zhang Yi and Liao Hua to lead our forces to guard Yang'an Pass and the bridge at Yinping."

One of Liu Shan's trusted eunuchs, Huang Hao, who believed in sorcery, believed a fortune-tellers' prediction that Wei would not invade Shu, so he advised the emperor to ignore Jiang Wei's memorial and not put it up for discussion in the imperial court.

Prelude

Between 20 September and 19 October 263, the Wei troops mobilised for the campaign had gathered in the Wei capital Luoyang and were ready to depart. Before they left, the Wei government gave out promotions and rewards, and staged a drill to boost their morale. During this time, when a Wei officer Deng Dun (鄧敦) said that Shu could not be conquered, Sima Zhao executed him as a warning to others to not speak ill of the campaign.

Zhong Hui had ordered Xu Yi, a son of the veteran Wei general Xu Chu, to oversee the construction of a road leading into Shu. However, when the road turned out to be poorly built, Zhong Hui disregarded Xu Yi's background and executed him for failing his mission. The Wei army was shocked at Zhong Hui's audacity.

Wei reinforcements

Between 20 October and 17 November 263, Sima Zhao ordered three commandery administrators to lead their garrison forces to join the campaign: Wang Qi to lead troops from Tianshui Commandery to attack Jiang Wei's camp; Qian Hong to lead troops from Longxi Commandery and launch a frontal assault on Jiang Wei's position; and Yang Xin (楊欣) to lead troops from Jincheng Commandery (金城きんじょう郡ぐん; around present-day Yuzhong County, Gansu) to attack Gansong.

Liu Qin (劉りゅう欽) also led troops from Weixing Commandery (魏ぎ興おき郡ぐん; around present-day Ankang, Shaanxi) to attack Hanzhong Commandery via the Ziwu Valley (子こ午うま谷だに; east of present-day Yang County, Shaanxi).

Shu response to the Wei invasion

Upon receiving news of the Wei invasion, the Shu government ordered Liao Hua to lead reinforcements to support Jiang Wei at Tazhong. At the same time, they also sent Zhang Yi, Dong Jue and others to lead troops to Yang'an Pass (陽ひ安やす關せき; a.k.a. Yangping Pass 陽平ようへい關せき; in present-day Ningqiang County, Shaanxi) and assist the Shu forces defending the external perimeter.

When the Shu reinforcements reached Yinping (陰平かげひら; present-day Wen County, Gansu), they heard that the Wei army led by Zhuge Xu was attacking Jianwei (建たて威たけし; northeast of present-day Wudu District, Longnan, Gansu), so they stopped in their tracks at Yinping.

Eastern flank

Hancheng

Lecheng

Yang'an Pass

Chengdu

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Map of present-day Sichuan showing key locations on the eastern flank: Hancheng, Lecheng and Yang'an Pass.

Lecheng and Hancheng

Around September or October 263, after his army passed through the Xie and Luo valleys as planned, Zhong Hui ordered his subordinates Li Fu and Xun Kai (荀愷) to each lead a detachment of 10,000 troops to attack Lecheng and Hancheng respectively. At the time, Lecheng and Hancheng were respectively guarded by the Shu officers Wang Han (王おう含) and Jiang Bin, who each commanded 5,000 troops.

During this time, Zhong Hui wrote to Jiang Bin to ask him for the location of the tomb of his father Jiang Wan. Jiang Bin politely obliged and told Zhong Hui that his father's tomb was in Fu County (涪縣; present-day Mianyang, Sichuan). Zhong Hui sent his men to pay respects on his behalf at Zhuge Liang's tomb at Mount Dingjun, and later visited Jiang Wan's tomb when he reached Fu County.

Wang Han and Jiang Bin managed to hold their positions at Lecheng and Hancheng respectively. After failing to capture either of the two fortresses, Zhong Hui led his army to bypass the two fortresses and move on towards Yang'an Pass. While Wang Han's eventual fate is unknown, it is recorded that after the fall of Shu, Jiang Bin surrendered to Zhong Hui at Fu County and befriended him.

Yang'an Pass

While Zhong Hui was supervising the assaults on Lecheng and Hancheng, he ordered Hu Lie to lead the vanguard force to attack Yang'an Pass and seize control of the pass's stockpiles of food supplies and equipment.

The Shu general Fu Qian was in charge of guarding Yang'an Pass. His subordinate, Jiang Shu (蔣舒), previously served as an area commander at Wuxing (武たけ興おき縣けん; present-day Lueyang County, Shaanxi). However, due to incompetence, he was removed from his appointment and reassigned to Yang'an Pass. As a result, he bore a grudge against the Shu government and secretly desired to defect to Wei.

Jiang Shu first attempted to persuade Fu Qian to lead his troops out of Yang'an Pass to engage the enemy in battle, but Fu Qian refused as he felt that it was too risky. Jiang Shu then lied to Fu Qian that he would go out to fight the enemy while Fu Qian would remain behind to guard the pass. After Fu Qian agreed, Jiang Shu led the troops out of Yang'an Pass to Yinping, where he surrendered to Hu Lie. Seeing that Yang'an Pass's defences had weakened after Jiang Shu's defection, Hu Lie led his troops to attack the pass and succeeded in capturing it along with its resources. Fu Qian fought bravely to resist the enemy but ultimately lost his life. The Wei soldiers were impressed by his heroism.

Western flank

Tazhong

Yinping

Fu County

Jiange

Chengdu

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Map of present-day Sichuan showing key locations on the western flank: Tazhong, Yinping, Fu County and Jiange.

From Tazhong to Yinping

Around mid-November 263, after one month of battle at Tazhong, Deng Ai defeated Jiang Wei in battle and forced him to retreat towards Yinping. After Jiang Wei received news that Zhong Hui's army had taken Yang'an Pass and occupied Hanzhong, he attempted to retreat to Baishui (白水しろみず; in present-day Qingchuan County, Sichuan) but Yang Xin caught up with him and defeated him at Qiangchuankou (彊つよし川口かわぐち; the intersection of the Bailong and Jialing rivers) near Yinping.

Upon learning that Zhuge Xu had blocked his retreat route at the Wujie Bridge near Yinping, Jiang Wei led his remaining troops through Konghan Valley (孔あな函はこ谷だに; south of present-day Xigu District, Lanzhou, Gansu) to the northern road in an attempt to bypass Zhuge Xu's position. When Zhuge Xu heard about it, he retreated back by 30 li. By then, Jiang Wei and his troops had travelled about 30 li on the northern road when they heard that Zhuge Xu had lifted the blockade at the bridge. Jiang Wei ordered his troops to turn back and quickly cross the bridge. Zhuge Xu tried to turn back to block Jiang Wei again but arrived at the bridge one day too late. After crossing the bridge, Jiang Wei moved to the fortified mountain pass Jiange (in present-day Jiange County, Sichuan) and garrisoned there.

Shu defence of Jiange

A reconstruction of Jiange (Jianmen Pass) in present-day Jiange County, Sichuan

By the time the Shu reinforcements led by Zhang Yi and Dong Jue reached Hanshou County, Jiang Wei and Liao Hua had decided to abandon their position at Yinping and rendezvous with Zhang Yi and Dong Jue at Jiange.

During this time, Zhong Hui launched several assaults on Jiange but failed to breach the mountain pass's defences. He then wrote a letter to Jiang Wei to persuade him to surrender:

"Sir, you are skilled in both civil and military affairs. You are exceptionally brilliant in strategy and your achievements are well-known throughout the Bashu region and the rest of the Empire. People from near and afar admire you. Every time I reflect on history, I hope that we can serve the same dynasty. Our relationship is like the friendship between Jizha and Zichan."

Jiang Wei did not reply to Zhong Hui's letter, and ordered his troops to strengthen their defences at Jiange. Zhong Hui also wrote a long address to the Shu forces to urge them to surrender:

"In the past, when the Han dynasty declined, the Empire became fragmented and the people suffered extreme hardships. Emperor Wu used his divinely-bestowed military genius to bring order to chaos, save the people from their suffering, and restore peace and stability to the Empire. Emperor Wen followed the will of Heaven and the people, and took the throne. Emperor Ming expanded on their legacy and made glorious achievements during his reign. Outside our borders, there are many people living under different regimes and having different cultures from us, and they have yet to experience the grace and benevolence of our Empire. The three Previous Emperors thought it was a great pity. The current Emperor has a magnanimous heart and the will to expand his predecessors' legacy. His subjects serve with the utmost loyalty, do their best to serve the dynasty, maintain order and stability in government, and bring peace and prosperity to the people. That is why our Empire is so well-ruled. When we show benevolence towards ethnic minorities, they willingly submit to our rule. Are the people of Shu any different from other peoples? It is a shame that the people of Shu are bound to a lifetime of endless servitude. Our army has received a mission to act in accordance with Heaven's will and punish those who oppose the dynasty. The General Who Attacks the West, Inspector of Yong Province, and General Who Guards the West are leading five armies on this mission. The armies of ancient times went to war in the name of righteousness and benevolence. A ruler's army should seek to win the people's hearts instead of simply fighting. Yu Shun ruled with benevolence to win over the Miao; when King Wu of Zhou overthrew the Shang dynasty, he opened up the vaults and distributed the riches to the people, and honoured the virtuous officials who previously served under Shang. At the present, the General Who Guards the West goes to war not for the purposes of gaining greater glory for himself and the dynasty; what he truly desires is to save the people from suffering. He shall explain the perilous situation you are currently in, and he hopes that you will heed his honest advice. The Former Lord of Yi Province had grand ambitions when he built an army from scratch. When he suffered defeats in Ji and Xu provinces and got threatened by Yuan Shao and Lü Bu, our Emperor Wu came to his aid and developed a bond with him. However, he betrayed Emperor Wu later and they no longer shared similar beliefs. While Zhuge Kongming governed Shu well and secured its borders, Jiang Boyue kept waging war, harassing our borders and causing harm to the Qiang and Di peoples. At the time, as we were busy with other affairs, we had no time to deal with his intrusions. Now that our borders are peaceful and our Empire is stable, we decide to amass our forces and wait for an opportunity to launch an all-out retaliatory strike. Shu draws its military strength from only one province and its defences are scattered around; it stands no chance against our imperial army. The Shu forces has already suffered disastrous defeats at Duan Valley and Houhe; it cannot hope to resist the might of our army. In recent years, Shu has never been quite peaceful as it has constantly been in a state of war and its people are already exhausted. How can it hope to resist an army united in spirit and purpose? You have witnessed it. In the past, Shu's chancellor Chen Zhuang was captured by the Qin army, while Gongsun Shu was killed by Wu Han. As you can see, no power can occupy and rule any of the Nine Provinces for long. You would have probably heard that intelligent people can foresee danger and wise people can avoid disaster. That was how Weizi left the Shang dynasty and became a guest of the Zhou dynasty; that was how Chen Ping left Xiang Yu to serve the Han dynasty and made great achievements later. Your desire to seek a moment's peace is akin to consuming a slow-acting poison. Can you not think of doing something better than limiting yourself to serving Shu? Our Empire is willing to spare our enemies and our leaders are willing to show benevolence. Those who surrender to us early receive generous treatment; those who surrender to us late will not be spared. When the Wu general Sun Yi surrendered to us, he received promotions and rewards. Wen Qin and Tang Zi betrayed us and joined the enemy. In the end, when Tang Zi was captured and Wen Qin's two sons surrendered to us, we still treated them well by awarding them titles and appointing them as generals. Tang Zi even had the opportunity to participate in high-level state affairs. The Emperor also highly favoured Sun Yi. Shu has so many virtuous talents, so all the more we would welcome them with open arms. If you can carefully assess the situation and decide to follow in the footsteps of Weizi and Chen Ping, we are willing to treat you and your descendants generously. Imagine how nice this would be: Everyone in the Empire lives in peace and harmony; farmers work in the fields; markets bustle with activity; there is no danger; there is only prosperity for everyone. If you persist in seeking a moment's peace and refuse to mend your ways, it will be too late for regrets by the time our army destroys Shu. Please carefully consider your choices and make the best decision for yourself. You should also inform the others and let everyone know our intentions."

When his army's food supplies ran low, Zhong Hui considered giving up on taking Jiange and retreating.

Zhong Hui seizing command of Zhuge Xu's army

When Deng Ai asked Zhuge Xu to join him in taking a detour to bypass Jiange, the latter refused because he was not authorised to. Zhuge Xu then led his army to Baishui to rendezvous with Zhong Hui and join him in attacking Jiang Wei at Jiange. Zhong Hui wanted to seize control of Zhuge Xu's army so he secretly reported to the Wei imperial court that Zhuge Xu showed cowardice during battle. As a result, Zhuge Xu was relieved of his command and sent back to the Wei capital Luoyang in a prison cart.

Deng Ai's detour

Yinping

Mianzhu

Chengdu

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Map of present-day Sichuan showing key locations on Deng Ai's detour to Chengdu: Yinping, Mianzhu and Chengdu.

When he was at Yinping, Deng Ai came up with the idea of taking a shortcut through Deyang Village to Fu County that would lead them to an area about 100 li west of Jiange and about 300 li from the Shu capital Chengdu. His idea was to lure Jiang Wei to send reinforcements from Jiange to Fu County and weaken Jiange's defences; if Jiang Wei did not send reinforcements, Fu County would be isolated and easily conquered.

Zhong Hui approved Deng Ai's idea and even ordered his subordinate Tian Zhang (田た章あきら) to join Deng Ai on the expedition. Some time between 18 November and 17 December 263, Deng Ai led a strike force from Yinping through the shortcut, bypassing the west of Jiange and heading straight towards Jiangyou. The shortcut covered a distance of more than 700 li and cut across mountainous terrain. Deng Ai and his men had to construct several bridges along the way. The mountains were high and the valleys were deep, which made the journey extremely dangerous. After some time, they were completely cut off from their supply train. Deng Ai wrapped himself in a large piece of felt and rolled down the mountain. His men climbed trees and scaled cliffs in single file. Along the way, they encountered three groups of Shu ambushers, defeated them and destroyed their camps. Deng Ai let Tian Zhang lead the vanguard and clear the path. Deng Ai and his vanguard showed up at Jiangyou. Ma Miao (馬うま邈), the Shu-appointed administrator of Jiangyou, gave up resistance and surrendered to Deng Ai.

Battle of Mianzhu

Following their capture of Jiangyou, Deng Ai and his men pushed on further to Fu County, where they encountered resistance from Shu forces led by Zhuge Zhan. Zhuge Zhan's subordinate, Huang Chong, urged his superior to swiftly take control of the mountainous terrain around Fu County and use that geographical advantage to stop the Wei forces from entering the flat lands. When Zhuge Zhan hesitated, Huang Chong broke down in tears as he repeatedly urged the former to do so.

Zhuge Zhan then ordered his vanguard force to attack Deng Ai at Fu County but they lost the battle. Zhuge Zhan and his remaining troops then retreated to Mianzhu, where he soon received a letter from Deng Ai asking him to surrender. A furious Zhuge Zhan executed the messenger who delivered the letter, and ordered his troops to assemble in formation outside Mianzhu and prepare to engage the enemy in battle.

Deng Ai ordered his son Deng Zhong (鄧忠) and subordinate Shi Zuan (師し纂) to each lead a detachment of troops to flank Zhuge Zhan from the right and left respectively. After failing to break the Shu formation, they returned to Deng Ai and told him: "The enemy cannot be defeated." Deng Ai sternly replied: "This battle will determine whether we live or die. What do you mean when you say the enemy cannot be defeated?" When he threatened to execute them for cowardice, they quickly turned back and led their troops to attack again. On their second attempt, they succeeded in breaking the Shu formation and then proceeded to occupy Mianzhu. Zhuge Zhan, along with his son Zhuge Shang and subordinates Huang Chong, Li Qiu and Zhang Zun, were all killed in action at Mianzhu.

Fall of Shu

When Jiang Wei learnt of the fall of Mianzhu, he led his forces east towards Ba Commandery (巴ともえ郡ぐん; present-day Chongqing). Zhong Hui led his army to Fu County and ordered Hu Lie, Tian Xu, Pang Hui and others to lead troops to pursue Jiang Wei.

Liu Shan's surrender

In the meantime, after capturing Mianzhu, Deng Ai and his men pressed on further to Luo County (雒縣; north of present-day Guanghan, Sichuan) near the Shu capital Chengdu. Around this time, when Liu Shan held a discussion with his subjects on what options they had, some suggested that they flee to their ally state Wu while others proposed retreating southward into the Nanzhong region (covering parts of present-day southern Sichuan, Yunnan and Guizhou).

Liu Shan ultimately heeded Qiao Zhou's suggestion to give up resistance and surrender to Deng Ai. One of Liu Shan's sons, Liu Chen, had strongly advocated making a last stand against Deng Ai. However, after Liu Shan decided to surrender, Liu Chen went to the ancestral temple of his grandfather Liu Bei and cried his heart out. He then killed his wife and children before committing suicide.

Liu Shan wrote a surrender document as follows:

"Due to two rivers cutting across our lands, we have become deeply and distantly separated from each other. We occupied Shu by chance, thought that we could hold up in one corner, and defied Heaven's will and the Empire's might. As the years passed, we gradually found ourselves drifting further away from the imperial capital by tens of thousands of li. I often recall the time during the Huangchu era when Emperor Wen sent General Xianyu Fu to Shu to announce a warmly- and sincerely-worded imperial edict, reiterate his kindness, and open his doors to accepting our surrender. He made his benevolence and righteousness so obvious. I am of poor character and virtue. I failed to see the bigger picture, greedily clung on to the mediocre legacy of my predecessor, put up a struggle for so many years, and resisted attempts by the Empire to make us more civilised. When Heaven expresses its fury, it is just a matter of time before all things submit to its authority. The Empire's grand army shows its might and instils fear everywhere it goes. Who dares to not have a change of heart and meekly submit to its power? I have ordered all my officers and soldiers to lay down their weapons and remove their armour, all the government offices to keep their treasuries and stores intact, all my people to line up in the outskirts of their cities, and all food supplies to be left in the fields. We await the Empire's grace, and hope that our people can preserve their lives. I bow down in the hope that the Great Wei Empire will, with the aid of wise and virtuous officials like Yi Yin and the Duke of Zhou, rule with benevolence and spread its virtues throughout the world. I hereby send my aides Palace Attendant Zhang Shao, Household Counsellor Qiao Zhou, and Chief Commandant of Escorting Cavalry Deng Liang to present my seal of authority to you as an act of surrender and as a token of my sincerity and allegiance. My fate shall totally rest in the hands of you, General. I will also bring along a coffin when I meet you. There is no need for me to say anything further.

As instructed, Zhang Shao, Qiao Zhou and Deng Liang brought the surrender document and Liu Shan's imperial seal to Deng Ai at Luo County. Deng Ai was so pleased to receive the surrender document and imperial seal that he reported victory to the Wei government and sent Zhang Shao and Deng Liang back to Chengdu. At the same time, Liu Shan also instructed Zhang Jun (張ちょう峻たかし) and others to relay his orders throughout the Shu territories to surrender to Wei, and sent Jiang Xian to order Jiang Wei to surrender to Zhong Hui at Fu County. He then sent Li Hu (李り虎とら) to present to Deng Ai a record book containing demographic and other statistical data about Shu. According to the records, Shu had 280,000 households, a population of 940,000, an army of 120,000, 40,000 officials, over 400,000 hu of grain, 2,000 jin of gold, 2,000 jin of silver, and 400,000 rolls of brocade and coloured silk.

When Deng Ai and his troops arrived at the north gate of Chengdu, Liu Shan tied himself up and brought along a coffin as he led an entourage of over 60 people to officially surrender to Deng Ai. Deng Ai burnt the coffin, freed Liu Shan from his bonds and treated him kindly. Using the acting imperial authority granted to him by the Wei government, Deng Ai appointed Liu Shan as acting General of Chariots of Cavalry (驃騎將軍しょうぐん) and granted other titles to former Shu nobles and officials. He allowed Liu Shan to continue living in his palace and even visited Liu Shan and his family later. At the same time, he forbid his troops from plundering and pillaging Chengdu, and ordered that daily activities in the city resume as per normal. The people of Shu were very impressed with Deng Ai's generosity and kindness; some former Shu officials even became his subordinates.

Deng Ai appointed Shi Zuan as the Inspector of Yi Province and put Qian Hong in charge of overseeing the former Shu commanderies. He also ordered the construction of a memorial at Mianzhu to glorify his victory and had the fallen Wei soldiers buried there alongside their Shu counterparts.

Jiang Wei's surrender

Meanwhile, the Shu forces under Jiang Wei received confusing information about the situation in Chengdu. Some said that Liu Shan wanted to remain in Chengdu and defend the city, while others claimed that the Shu emperor was going to abandon Chengdu and flee south to Jianning Commandery (建たて寧やすし郡ぐん; covering parts of present-day Yunnan and Guizhou). Jiang Wei thus prepared to lead his troops to Qi County (郪縣; present-day Santai County, Sichuan), which was nearer to Chengdu, to verify the truth. Just then, they received orders from Chengdu to lay down their arms and surrender to Zhong Hui at Fu County. Many Shu soldiers felt so shocked and angry when they heard of their emperor's surrender that they drew their swords and slashed at rocks to vent their frustration.

When Zhong Hui finally met Jiang Wei, he asked him: "Why are you late?" With a solemn expression on his face and tears streaming down his cheeks, Jiang Wei replied: "Our meeting today came too early." Zhong Hui was impressed by Jiang Wei's response.

Wu reinforcements

Between 18 November and 17 December 263, the Shu government had made an urgent request for support from their ally state, Wu, in the east. On 8 January 264, the Wu emperor Sun Xiu ordered five officers to lead three separate forces to attack Wei territories in the hope of diverting Wei attention away from Shu: Ding Feng to attack Shouchun (壽ことぶき春はる; present-day Shou County, Anhui); Liu Ping and Shi Ji to attack Nan Commandery (南みなみ郡ぐん; around present-day Jingzhou, Hubei); and Ding Fēng and Sun Yi to attack Wei territories along the middle Mian River. The Wu forces pulled back when they received news of the fall of Shu.

Aftermath

Deng Ai's arrest and downfall

Further information: Deng Ai § Downfall and death, and Zhong Hui § Arresting Deng Ai

Feeling proud of his achievements, Deng Ai became very arrogant and boastful as he took control of and oversaw the post-war Shu territories. Around February 264, he wrote to Sima Zhao to suggest ideas to conquer Wei's other rival state, Wu. When Sima Zhao told him that his proposal had to be discussed in the imperial court before approval, Deng Ai grew impatient and hinted that he was justified in ignoring standard protocol and behaving autocratically as long as he acted in Wei's interests. Zhong Hui, who secretly desired to rebel against Wei, used the opportunity to exploit and manipulate Deng Ai's arrogance to great effect. After intercepting a report from Deng Ai to the Wei imperial court, he imitated Deng Ai's handwriting and edited the report to make it sound rude and demanding. He also destroyed a letter from Sima Zhao to Deng Ai.

In late February 264, the Wei imperial court ordered Zhong Hui and Wei Guan to arrest Deng Ai, relieve him of his command, and send him back to Luoyang in a prison cart. On or after 3 March 264, Wei Guan sent Tian Xu to lead soldiers to intercept and kill Deng Ai, his son Deng Zhong and subordinate Shi Zuan at the west of Mianzhu.

Zhong Hui's rebellion

Main article: Zhong Hui's Rebellion

After Deng Ai was arrested and taken away, Zhong Hui assumed overall command of the Wei forces occupying former Shu territories. At Jiang Wei's instigation, he decided to start a rebellion against Sima Zhao, and came up with a strategy to attack Luoyang with Jiang Wei's assistance.

On 1 March 264, a day after arriving in Chengdu, Zhong Hui summoned all the high-ranking Wei officers to attend a meeting and showed them a fake imperial decree ordering them to rise up against Sima Zhao and overthrow him. However, he became worried that the officers were unwilling to support him so he instructed his close aides to seize command of the officers' units and detain the officers. On 3 March, when there were rumours that Zhong Hui wanted to purge all the officers who refused to participate in the rebellion, the detained officers broke out of captivity, regrouped with their units, and launched a mutiny against Zhong Hui. Chaos broke out in Chengdu and hundreds of people were killed. Zhong Hui and Jiang Wei fought the mutinying soldiers but were ultimately overwhelmed and killed.

Wu invasion of Badong

Main article: Siege of Yong'an

During the Wei invasion of Shu, the Shu general Yan Yu (閻宇), who was in charge of guarding Badong Commandery (巴ともえ東ひがし郡ぐん; covering parts of present-day Chongqing), received orders to lead troops from Badong to support the Shu forces at the frontline. Yan Yu's deputy, Luo Xian, remained behind with only 2,000 troops to guard Yong'an (永安えいあん; present-day Fengjie County, Chongqing), the capital of Badong Commandery.

In November or December 263, when news of Chengdu's fall reached Yong'an, Luo Xian managed to calm down the people and restore order and stability in Yong'an. After receiving news confirming that Liu Shan had indeed surrendered to Wei, Luo Xian gathered all his troops and mourned the fall of Shu for three days.

In the meantime, Wu prepared to take advantage of the situation to invade Shu and seize control of former Shu territories under the pretext of sending reinforcements to help Shu resist the Wei invaders. Around March 264, the Wu general Bu Xie led troops from Xiling (西陵せいりょう; present-day Yichang, Hubei) to attack Yong'an but encountered strong resistance from Luo Xian and his men. As the Wu forces rained arrows on his position, Luo Xian ordered his subordinate Yang Zong (楊宗) to break out of the siege and seek help from Wei. He also surrendered his tallies and sent his son as a hostage to convince the Wei regent Sima Zhao of his sincerity. During this time, he led his men to strike back at the Wu forces and defeated them.

Enraged at Bu Xie's defeat, the Wu emperor Sun Xiu ordered his general Lu Kang to lead 30,000 troops to support Bu Xie and besiege Yong'an. After a six-month-long siege, more than half of Yong'an's population fell sick from infectious diseases. Just then, the Wei general Hu Lie led reinforcements from Jing Province to help Luo Xian and lift the siege on Yong'an. The Wu forces retreated upon seeing the arrival of Wei reinforcements. Sima Zhao accepted Luo Xian's surrender and ordered him to remain behind and continue guarding Yong'an.

Order of battle

Wei forces

• Grand Chief Controller (大だい都と督とく) Sima Zhao, the regent of Wei, oversaw the entire campaign from the Wei capital Luoyang.
• General Who Guards the West (鎮西ちんぜい將軍しょうぐん) Zhong Hui led an army of over 100,000 to attack Shu from the eastern flank.
  • Official of Justice (廷尉卿きょう) Wei Guan served as an acting military judge under Zhong Hui. He also received imperial authority to supervise Zhong Hui and Deng Ai's military operations.
  • Chief Clerk (長ちょう史ふみ) Du Yu
  • General of the Vanguard (前ぜん將軍しょうぐん) Li Fu (李り輔) led a detachment of 10,000 troops to attack Lecheng County.
  • Army Protector (護まもる軍ぐん) Xun Kai (荀愷) led a detachment of 10,000 troops to attack Hancheng County.
  • Army Protector (護まもる軍ぐん) Hu Lie led the vanguard force to attack Yang'an Pass.
  •   Officer of the Standard (牙きば門もん將しょう) Xu Yi oversaw the construction of a road leading into Shu. He was executed for failing his mission when the road turned out to be poorly built.
  • Tian Zhang (田た章あきら) accompanied Deng Ai on his detour through the shortcut to Mianzhu.
  • General Who Pacifies Bandits (平ひら寇將軍ぐん) Pang Hui
  • Army Protector (護まもる軍ぐん) Tian Xu
• Inspector of Yong Province (雍州刺史しし) Zhuge Xu led an army of 30,000 to attack Shu from the central flank.
• General Who Attacks the West (征せい西にし將軍しょうぐん) Deng Ai led an army of 30,000 to attack Shu from the western flank.
  • Deng Zhong led the attack on Mianzhu.
  • Major (司馬しば) Shi Zuan (師し纂), a former registrar under Sima Zhao. He was reassigned to serve in Deng Ai's army. He led the attack on Mianzhu.
• Administrator of Weixing (魏ぎ興きょう太守たいしゅ) Liu Qin (劉りゅう欽) led troops from Weixing Commandery to attack Hanzhong Commandery via the Ziwu Valley.
• Administrator of Tianshui (天水てんすい太守たいしゅ) Wang Qi led troops from Tianshui Commandery to attack Tazhong.
• Administrator of Longxi (隴西太守たいしゅ) Qian Hong led troops from Longxi Commandery to attack Tazhong.
• Administrator of Jincheng (金城きんじょう太守たいしゅ) Yang Xin (楊欣) led troops from Jincheng Commandery to attack Gansong.

Shu forces

•   General-in-Chief (大將軍だいしょうぐん) Jiang Wei led the Shu defences at Tazhong before he retreated to Yinping and then to Jiange.
  •   Right General of Chariots and Cavalry (右みぎ車しゃ騎き將軍しょうぐん) Liao Hua led reinforcements to support Jiang Wei at Tazhong and Yinping before retreating to Jiange together with him.
  •   Left General of Chariots and Cavalry (左ひだり車しゃ騎き將軍しょうぐん) Zhang Yi led reinforcements to join Jiang Wei at Jiange.
  •   Senior General Who Assists the State (輔國大將軍だいしょうぐん) Dong Jue led reinforcements to join Jiang Wei at Jiange.
•  † Left General of the Household (左ひだり中ちゅう郎ろう將しょう) Fu Qian guarded Yang'an Pass.
  •   Jiang Shu (蔣舒) defected to Wei forces and assisted them in capturing Yang'an Pass.
• Army Inspector (監かん軍ぐん) Wang Han (王おう含) led 5,000 troops to guard Lecheng County.
•   General of Pacifying Martial Might (綏武將軍しょうぐん) Jiang Bin led 5,000 troops to guard Hancheng County.
•   Administrator of Jiangyou (江こう油あぶら太守たいしゅ) Ma Miao (馬うま邈) guarded Jiangyou.
•  † General Who Protects the Army (護まもる軍ぐん將軍しょうぐん) Zhuge Zhan guarded Mianzhu.
  •  † Zhuge Shang
  •  † Master of Writing (尚書しょうしょ) Huang Chong
  •  † Master of Writing (尚書しょうしょ) Zhang Zun
  •  † Right Commander of the Yulin Imperial Guards (羽林はばやし右みぎ部ぶ督とく) Li Qiu
• Right General-in-Chief (右みぎ大將軍だいしょうぐん) Yan Yu (閻宇) led reinforcements from Badong Commandery to defend Chengdu.
  •   Army Commandant (領りょう軍ぐん) Luo Xian defended Yong'an County from a Wu invasion after the fall of Shu.
    • Yang Zong (楊宗) was sent by Luo Xian to seek reinforcements from Wei in defending Yong'an from Wu.

Wu forces

• General-in-Chief (大將軍だいしょうぐん) Ding Feng led Wu forces to attack Shouchun and divert Wei attention away from Shu.
  • Liu Ping led Wu forces to attack Nan Commandery.
  • Upper General-in-Chief (上大かみおお將軍しょうぐん) Shi Ji led Wu forces to attack Nan Commandery.
  • General of the Rear (後こう將軍しょうぐん) Ding Fēng led Wu forces to attack Wei territories along the middle Mian River.
  • Sun Yi led Wu forces to attack Wei territories along the middle Mian River.
• General Who Pacifies the Army (撫なで軍ぐん將軍しょうぐん) Bu Xie led Wu forces to attack Yong'an County after the fall of Shu.
• General Who Guards the Army (鎮軍將軍しょうぐん) Lu Kang led 30,000 troops to reinforce Bu Xie.

In popular culture

Mie Shu Ji (滅めつ蜀しょく記き; literally: The Tale of the Destruction of Shu; ISBN 9789867480972) is a 2008 novel by Li Bo (李り柏かしわ) that dramatises the events leading to the fall of Shu, with Jiang Wei, Deng Ai and Zhong Hui as the central characters.

References

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• Luo, Guanzhong (14th century). Romance of the Three Kingdoms (Sanguo Yanyi).
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• Yuan, Tingdong (1988). War in Ancient China (1st ed.). Chengdu: Sichuan Academy of Social Science Publishing House. ISBN 7-80524-058-2.
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