Chencang

Chencang is a strategically important fortified city whose changing fortunes shape the northern campaigns of Kong Ming. Its strong defenses turn an attempted rapid conquest into a costly contest of siege methods; its eventual capture gives the Shu army access to the San Pass and approaches toward Wudu and Yinping. Later, the razed city becomes an exposed encampment where torrential rain undermines Sima Yi’s army and helps force its withdrawal.

Strategic Setting and the First Advance

After the death of Zhao Zilong, Kong Ming petitions the second ruler for permission to continue the war against the north and fulfill the mandate entrusted to him by the first ruler. The ruler approves, and Kong Ming sends an army of three hundred thousand toward Chencang, with Wei Yan leading it. Cao Zhen, seeking to redeem an earlier failure, marches to protect the key passes with one hundred and fifty thousand men; Wang Shuang commands the vanguard.

The city’s importance is made plain by its defenses. When the Shu army arrives, it finds Chencang strongly fortified and under the command of Hao Zhao. An assault fails, and a proposed attempt to persuade Hao Zhao to surrender also comes to nothing. Jin Xiang, who knows the defender, makes two approaches: Hao Zhao rejects the first and prevents the second from reaching him, threatening Jin Xiang from the wall with a bow.

Kong Ming’s spies report that the garrison may number only three thousand. Believing that a small force can be overcome with siege equipment, he orders the construction of a hundred siege towers. Hao Zhao’s defenders destroy them with volleys of flaming arrows, and the resulting fire kills many of the men inside the towers. The next effort, a mass attack with battering rams, also fails: Hao Zhao uses heavy rocks suspended on ropes to smash the rams. When Kong Ming orders tunnels dug beneath the walls, the defenders dig counter-tunnels and kill the miners. Chencang thus resists not through a single obstacle but by meeting each new method with a prepared answer.

Defeat Outside the Walls and a Changed Opportunity

The arrival of Wang Shuang’s vanguard compounds the setback. Wang Shuang kills a Shu commander, and the loss prompts panic and flight among the Shu troops. Desertions follow, leaving Kong Ming in serious difficulty. He accepts his commanders’ advice, particularly Jiang Wei’s proposal to create a diversion that might trap Cao Zhen and defeat Wang Shuang, and divides the army to carry it out.

The opportunity to take Chencang comes not from another successful assault but from a change inside the city. Kong Ming learns that Hao Zhao is seriously ill and orders Wei Yan and Jiang Wei to prepare to attack when they see flames rising within the walls. He tells them they have three days to get ready to leave. In fact, Kong Ming sets out immediately with Zhang Bao and Guan Xing, keeping his real timing from the commanders he has sent ahead.

When Wei Yan and Jiang Wei reach the city, Chencang has already fallen. Hao Zhao’s illness has demoralized the defenders, and men inside who favor Shu set the gates on fire. In the fighting that follows, Hao Zhao, recognizing that the city is lost and resistance has no hope, dies on his sickbed. The fall therefore reverses the earlier siege: the city that withstood towers, rams, tunnels, and direct attack is taken when its command is weakened and the gates are opened from within.

Routes Opened by the Capture

Kong Ming’s victory changes the campaign’s geography. After taking Chencang, the Shu army seizes the San Pass, preventing Wei reinforcements from reaching the city. From the plains beyond the Qishan hills, Kong Ming then sends Jiang Wei to capture Wudu and Wang Ping to seize Yinping. Chencang is not merely a prize in itself: its capture helps secure a passage through which the campaign can press farther into the surrounding region.

The news of the city’s fall reaches Cao Rui alongside reports of Hao Zhao’s death, Kong Ming’s movement through the Qishan hills, and Sun Quan’s declaration of himself as emperor. Cao Rui, distressed by the situation, summons Sima Yi for advice. Sima Yi argues that the immediate danger is Shu rather than Wu, reasoning that Lu Xun will wait to see which side gains the advantage. Cao Rui promotes him to the highest command and offers him the imperial seal then held by Cao Zhen; Sima Yi replies that he will obtain it himself. The capture of Chencang therefore draws the Wei court’s attention toward the Shu advance and helps set the stage for a major confrontation.

The Ruined City and Sima Yi’s Retreat

Later, Sima Yi arrives at Chencang to find the city razed to the ground, with nowhere there to shelter his troops. He has also observed that the stars foretell torrential rain. Despite his commanders’ urging, he orders the army to remain among the ruins rather than seek cover on the plains or in the mountains. The decision leaves the soldiers exposed when the rain comes: the waters rise more than three feet, and after a month the troops are cold, ill, and continually wet, their horses are dying, and the army’s morale has collapsed.

An imperial command eventually orders the force to abandon the campaign and return home. The troops welcome the news, though they remain aware that Shu might attack during the retreat. Chencang’s role has thus changed from defended obstacle to captured staging point and then to a shelterless ruin. Its military value lies in control of passage and reinforcement; its later condition turns the same location into a liability for an army that chooses to hold it through the storm.