Meng Da

Meng Da is a commander whose choices help turn Guan Yu’s desperate position at Maicheng into an irreversible rupture with Liu Bei’s side. He first persuades Liu Feng not to send relief to Guan Yu; later, when Liu Bei’s government moves against him, he defects to Cao Pi and launches a rebellion. The same political caution that once kept his troops from risking a rescue becomes part of a larger gamble that ends with Meng Da defeated and killed.

Position and Political Context

Meng Da is based with Liu Feng at Shangyong when Liao Hua arrives seeking help for Guan Yu, who is besieged at Maicheng. The military situation is precarious: the Wu forces hold Jingzhou, Guan Yu has only Maicheng, and Cao Cao is advancing with a much larger army. Meng Da argues that their own small force cannot safely intervene while caught between these two enemies. His reasoning is strategic, but it also makes his decision consequential: the immediate risk to his own position outweighs the appeal for help from Liu Feng’s uncle.

The novel gives that calculation a personal edge. Meng Da reminds Liu Feng that Guan Yu had objected to Liu Feng’s adoption and had questioned whether an adopted son should become heir. He uses this history to challenge Liu Feng’s sense of obligation: if Guan Yu did not treat him as a trusted nephew, Meng Da argues, Liu Feng need not endanger himself for Guan Yu. Their choice is therefore presented as more than a military assessment. It brings family standing and resentment into a moment when a fellow commander’s survival depends on assistance.

The Refusal at Maicheng

When Liu Feng asks how they can avoid appearing simply to abandon Guan Yu, Meng Da supplies a practical pretext: they can claim that they have only just secured Shangyong and must first win the confidence of its people. Liu Feng agrees. The next day, they tell Liao Hua that they will send no troops, citing their own precarious position. Liao Hua pleads with them, but they refuse; Meng Da says that even if they went, their small force would make no useful difference, and that Liao Hua must wait for Shu reinforcements.

The decision closes off the rescue that Liao Hua has come to seek. The episode sets Meng Da’s assessment of military risk beside the human and political cost of inaction: his argument treats intervention as futile, while Guan Yu’s peril is immediate. The refusal also becomes part of the later account of why Liu Bei’s government turns against both Meng Da and Liu Feng.

Defection and Rebellion

After Liu Bei hears of the failure to help Guan Yu and his son, his officers discuss punishing Liu Feng and Meng Da. Their plan is to separate the two men by sending Liu Feng to govern Mianzhu, preventing them from coordinating and making them easier to deal with individually. Meng Da learns that this move is under way when he receives official notice of Liu Feng’s reassignment. That night, he leaves with fifty riders and defects to Cao Pi, ruler of Wei.

Meng Da presents his departure in a carefully worded letter as an act of loyalty, but Liu Bei is furious. His defection transforms an earlier failure to act into an open political break. Liu Bei and his adviser Kong Ming devise a response that sends Liu Feng against Meng Da, framing the conflict as a way to resolve both men’s positions. The family and military dispute that began at Maicheng has now become a contest in which Meng Da must prove himself to his new ruler while facing the force sent by his former one.

Cao Pi’s Test and the Collapse of the Revolt

Cao Pi does not simply accept Meng Da as a trustworthy ally. When Meng Da reaches the Wei capital and word arrives that Liu Feng is coming with an army of about fifty thousand, Cao Pi directs Meng Da to fight him and says that bringing back Liu Feng’s head will establish Meng Da’s credibility. Meng Da first writes to Liu Feng, attempting to draw him over to Cao Pi’s service. Liu Feng rejects the appeal, and the two meet in combat at Xiangyang.

Their encounter begins with Meng Da retreating and Liu Feng pursuing him, but the apparent flight leads Liu Feng into an ambush. Liu Feng escapes to Shangyong, only to find that the city has surrendered to Wei; Fangling has also fallen by the time he reaches it. The reversals show how quickly the surrounding territorial situation changes, leaving both men caught in the consequences of shifting allegiance and local surrender. Meng Da, meanwhile, has secured neither a settled position nor a secure base for his own rebellion.

Later, Meng Da seeks support from the governors of Jincheng and Shangyong, believing they will join him. They delay their promised help while claiming to need time to prepare. Sima Yi deceives Meng Da by sending a message that presents him as still a loyal Wei commander and tells him that Sima Yi is marching toward Chang’an. Believing this leaves the way clear, Meng Da prepares to advance on Luoyang. Instead, a Wei force arrives at his city, and Xu Huang calls on him to open the gates as a traitor.

In the ensuing confrontation, Meng Da shoots an arrow that strikes Xu Huang in the head; Xu Huang dies later that night. The following day, Meng Da sees two columns of troops approaching from Jincheng and Shangyong and assumes they are reinforcements. They have betrayed him too. His rebellion is defeated, and he is killed. Sima Yi enters the city as a hero, then proceeds to Chang’an to report to Cao Rui, who apologizes for having listened to bad advice and demoted him.

Narrative Role

Meng Da’s trajectory is shaped by the progressive narrowing of his choices. At Maicheng, he argues that intervention cannot succeed and persuades Liu Feng to stay out of the conflict; later, he leaves Liu Bei’s service rather than accept the measures being taken against him. But the move to Cao Pi does not grant him security: the new ruler immediately tests his loyalty, the allies he expects fail him, and Sima Yi exploits his mistaken understanding of the military situation.

The story’s emphasis falls on the consequences of political calculation rather than on a single battlefield outcome. Meng Da’s refusal to assist Guan Yu is followed by punishment, defection, a forced confrontation with Liu Feng, and a revolt that collapses under deception and isolation. His death closes this arc, while Sima Yi’s recognition by Cao Rui restores the victorious commander to Wei’s service and confirms that Meng Da’s attempted change of allegiance has failed.