Strategic Background
From a military-history analyst's perspective, Zhugeliangnanzheng in 225 CE was the essential foundation for Shuhan's strategy of "stabilize first, then advance" — it was the indispensable prerequisite for the series of northern campaigns that followed. After Liu Bei's defeat at Yiling and death at Baidituogu in 223, the Shuhan court was shaken for two years while the four southern commanderies of Nanzhong revolted in succession: in Jianning, Yong Kai killed the grand administrator Zheng Ang and sent Zhang Yi bound to Sunwu; in Yuexi, the Yi chieftain Gao Ding raised troops and killed the Yuexi grand administrator Jiao Huang; in Zangke, grand administrator Zhu Bao defected with the entire commandery; and Meng Huo, the leading Yi chieftain of Nanzhong, participated in fomenting the unrest. These revolts not only tore away Shuhan's four southern commanderies in territorial terms but also declared to the world, politically, that "Shuhan's central government is no longer capable of maintaining its original authority." If Zhuge Liang could not complete the pacification of the south within two or three years, Shuhan's overall state credibility would collapse. Simultaneously, the troops, grain, and mineral resources needed for northern campaigns — gold, silver, cinnabar lacquer, draft oxen, and warhorses, all in abundance in Nanzhong — depended entirely on the south. Lose Nanzhong, and Shuhan could never wage war to the north. The southern campaign was therefore not an optional military action but a precondition for political survival.
Deployment of Forces
Shuhan's deployment reflected Zhuge Liang's mature capacity for multi-column coordination. Three columns: Zhuge Liang personally led the central column through Yuexi; Li Hui led the eastern column through the Yizhou road; Ma Zhong led the western column through the Zangke road — the three columns forming an encircling net. At the same time, before the expedition, staff officer Ma Su offered the celebrated counsel: "to attack the heart is superior to attacking the city; to win the mind is superior to winning the battle." This counsel elevated the strategic objective of the southern campaign from "armed conquest" to "political assimilation." Once Zhuge Liang accepted it, the benchmark for victory shifted from "annihilating the rebel forces" to "securing Nanzhong's long-term submission" — transforming the campaign from a short-term military operation into a long-term governance project. On the rebel side, what existed was essentially a "loose coalition": Yong Kai operated under the patronage of Sunwu (Sun Quan had appointed him honorary grand administrator of Yongchang from afar); Gao Ding relied on Yi tribal military power; Zhu Bao invoked the authority of his title as commandery administrator; and Meng Huo drew on his traditional prestige as a Yi paramount chieftain of Nanzhong. The four forces had no unified command and were mutually suspicious of each other — Yong Kai was eventually killed by men under Gao Ding — and the rebel camp's internal fissures far exceeded its capacity to resist Zhuge Liang.
Critical Decision Points
There were four critical decision points in the southern campaign. The first was the adoption of Ma Su's "win the heart" strategy — this choice changed the nature of the campaign and avoided the vicious cycle of "fight, withdraw, and face fresh rebellion the next year." The second was Qiqinmenghuo — the Romance dramatizes this, but its historical core is real: by repeatedly releasing Meng Huo, Zhuge Liang brought him to understand the futility of resistance and the trustworthiness of submission — a rare case of "psychological conquest" in the history of Chinese warfare. The third was the settlement policy of "no garrison troops, no transported grain, allow indigenous chieftains to govern their own people" — after the campaign ended, Zhuge Liang did not station troops in Nanzhong but returned governing authority to the indigenous chieftains who had submitted (Meng Huo was appointed to a censor's position), a policy that dramatically reduced governance costs and avoided the common trap of "military-administrative rule provoking new uprisings." The fourth was "recruiting Nanzhong tribal fighters into the northern campaigns" — Zhuge Liang organized the Nanzhong Yi fighters into the celebrated "Wudang Flying Army" (commanded by Wang Ping), simultaneously absorbing the spoils of war and transforming potential rebels into core northern-campaign troops. These four decisions together constitute a textbook case of "soft conquest" in Chinese antiquity.
Outcome and Echoes
The campaign result was the complete submission of Nanzhong's four commanderies; Meng Huo and other Nanzhong chieftains did not rise in revolt again for the following several decades. This stability yielded three layers of strategic dividend for Shuhan. First, the threat to Shuhan's rear was removed, allowing Zhuge Liang to focus entirely on the western front. Second, Nanzhong's gold, silver, cinnabar lacquer, draft oxen, and warhorses entered Shuhan's fiscal system, alleviating the material bottleneck of chronic iron and horse shortages. Third, the Nanzhong Yi fighters who joined the Wudang Flying Army gave Shuhan a unique elite mountain-warfare corps that performed rearguard duties after the defeat at Jieting, protecting the withdrawal of Zhuge Liang's main force. Looking at a longer timespan, the southern campaign also formally extended Shuhan's authority into what are today Yunnan and Guizhou, and its political integration of the southwestern Yi peoples is of epochal significance — the cultural memories of later events such as the "Yihai Alliance" and "Tea-Horse Exchange" can all ultimately be traced back to the governing philosophy of Zhugeliangnanzheng. This is also why the regions of Yunnan and Guizhou still preserve, to this day, a wealth of folk traditions and place-names associated with Zhuge Liang.
Counterfactual Analysis
Counterfactual one: had Zhuge Liang rejected Ma Su's "win the heart" strategy and adopted traditional armed conquest, what would have resulted? The most likely outcome is "suppress the rebellion every year, face a new rebellion every year" — Nanzhong would have been locked in a protracted guerrilla war, and Shuhan would have been unable to launch the northern campaigns in 228. Zhuge Liang's political wisdom lay in his understanding that "Nanzhong was not territory to be conquered but a partner to be integrated." Counterfactual two: had Meng Huo submitted at the third or fourth capture, the entire southern campaign might have concluded in three months — but Zhuge Liang repeatedly released him, in essence creating a "public political theater": letting the peoples of Nanzhong witness firsthand that Meng Huo's resistance was futile and his submission honorable, thereby dissolving the entire region's will to resist. This "political theater" model was repeatedly studied thereafter — echoes of "reinforcing submission through repeated release" can be seen in historical events such as Wang Xuance's campaign against Tianzhu, Princess Wencheng's entry into Tibet, and the early Ming pacification of Yunnan. Counterfactual three: had Yong Kai not been killed by men under Gao Ding but instead unified the rebel forces, the difficulty of the southern campaign would have increased exponentially. This fork in the road tells us that Zhuge Liang's victory stemmed not only from the ingenuity of his own strategy but also from his precise exploitation of the rebels' internal fissures — a strategic art of "letting the enemy help you win."