Background
The Jiangdongkangcaojuece — Jiangdong's decision to resist Cao Cao — in the autumn of Jianan year 13 was the most structurally consequential political choice of the early San Guo period. It determined whether the Battle of Chibi would take place, whether the Sun-Liu alliance would be formed, and whether the north-south division of the realm would persist. Cao Cao had pacified Jingzhou and received the surrender of Liu Cong in the seventh month of that year, and he swiftly integrated the combined northern and Jingzhou water-land forces — reportedly numbering eight hundred thousand men — and marched south. The Jiangdong clique, from Sun Ce's founding of its kingdom through Sun Quan's succession, had been established in Jiangdong for eight or nine years, yet had never truly faced the full frontal pressure of the northern main force. From the standpoint of power structure, Jiangdong was split on three levels internally: the "Central Plains refugee gentry" led by Zhang Zhao, who inclined toward preserving the personal interests of their own families by accepting the court's pacification; the "old Sun loyalists" represented by the Huai-Si military men such as Zhou Yu and Cheng Pu, who were bound to the Sun family in life and death and had no choice but to advocate war; and the "strategic vision" faction represented by Lu Su, who, anchoring to the long-term goal of an independent Jiangdong kingdom, advocated joining forces with Liu Bei to form a north-south standoff.
Principal Figures
There were four groups of central parties to the event. The first is the decision-maker Sun Quan — repeatedly depicted in the novel as hovering in a state of "undecided murmuring" and "let me think further", reflecting the genuine psychological state of a young lord only twenty-six years old facing a life-or-death crisis for the patrimony built by his father and elder brother. The second is the submission faction's representative Zhang Zhao: as the minister entrusted with regency by Sun Ce and the head of Jiangdong's civil officials, his logic for advocating submission was on the surface "Cao Cao holds the Son of Heaven to command the feudal lords — submitting can preserve the court's orthodox line," but at a deeper level it was the traditional behavioral pattern of Central Plains gentry: "change masters, continue your stipend". The third is the war faction's representative Lu Su; he and Zhou Yu form an "inside-outside partnership" in the novel — Lu Su was responsible for privately opening Sun Quan's innermost defenses ("My lord, if you delay, you will surely be misled by the crowd"), while Zhou Yu presented the formal military petition for war and reassured Sun Quan's doubts with the pledge that "my few thousand elite troops from the Jiangdong left will be enough to defeat Cao Cao." The fourth group is the external catalyst, Zhuge Liang — who broke through Zhang Zhao's faction's monopoly on public discourse through the Shezhanqunru debate, and who maneuvered Zhou Yu into declaring his position by the device of "provoking Zhou Yu to anger," making him the most critical external variable in this decision.
The Central Issue
At the surface level the issue was "war or submission"; at the deeper level it was a question of survival for Jiangdong's independence. Submission meant the Sun family returning to court, relinquishing Jiangdong's military power, and the gentry once again attaching themselves to the central government — a path with a complete historical precedent (as Jingzhou's Liu Cong had just demonstrated). War meant that Jiangdong would confront Cao Cao head-on as an independent political entity: victory would yield a tripartite division of the realm; defeat would mean annihilation of the entire family. When Lu Su counseled Sun Quan privately, he delivered one line that cut to the heart of the matter: "Everyone else can submit to Cao Cao — only you, my lord, cannot". This line struck directly at the blind spot in the submission faction's logic: officials such as Zhang Zhao would retain their titles and salaries after submitting to Cao Cao, but Sun Quan, as the ruler of a separatist domain, would become a vanquished king the moment he submitted, with no path to survival. This insight into the "asymmetry of interests between ruler and ministers" was Lu Su's most strategically valuable contribution to Jiangdong's anti-Cao decision — it shifted the debate over war and submission from "odds of military victory" to "political survival or extinction," and transformed Sun Quan's hesitation from "can we win?" to "surrender means certain death."
Political Consequences
The most immediate consequence was the unification of Jiangdong's will to fight: Zhou Yu was appointed Grand Commander with thirty thousand troops, and together with Liu Bei he went to meet Cao Cao's advance, leading directly to the Battle of Chibi. Looking deeper, there were four consequences of this decision. First, it established the "Sun-Liu alliance" as the basic framework for opposing Caowei; over the following nearly seventy years this alliance oscillated between unity and division, but its strategic value remained a pillar of the San Guo configuration. Second, it set the succession lineage of Jiangdong military talent — Zhou Yu, Lu Su, Lv Meng, and Lu Xun — each generation of supreme commander receiving Sun Quan's full authority by virtue of a "pro-war" stance. Third, it shaped Sun Quan's distinctive political character of "decisive while young," allowing Jiangdong to maintain flexibility in its diplomacy toward Caowei and Shuhan for the subsequent decades. Fourth, it accelerated in the opposite direction Cao Cao's dual-track "navy plus diplomacy" campaign against Jiangdong, causing Caowei to begin treating Jiangdong as an independent political entity that could not be absorbed quickly — not merely a local separatist power awaiting pacification. From the novel's narrative perspective, this decision was also the first successful realization of Zhuge Liang's Longzhong strategy — the configuration of a Sun-Liu united front against Caowei was from this point established.
Counterfactual Analysis
The most imaginative counterfactual is: if Sun Quan had followed Zhang Zhao's advice and submitted to Cao Cao, Jiangdong would have been peacefully absorbed, and Cao Cao could have completed the grand momentum of unifying all under Heaven in the winter of Jianan year 13. The details on this path: Sun Quan would likely have been given a nominal title like Governor of Jiangdong; the Sun clan members would have been relocated to Ye for surveillance; military men such as Zhou Yu would have been dispersed into northern garrisons; and strategists such as Lu Su would have been absorbed into Cao Cao's staff — the San Guo configuration would never have emerged, and China might have proceeded directly into the next phase under unified Caowei rule. Second, if Lu Su had not immediately entered to advise Sun Quan privately after Zhang Zhao and the others left the hall, Sun Quan's hesitation might have persisted until Zhou Yu returned to Chaisang — by which time the submission faction's public-opinion pressure could have formed an irreversible political inertia, and even Zhou Yu's petition for war might not have been able to reverse the outcome. A third scenario: if Zhou Yu had not made an explicit petition for war after being "goaded by Zhuge Liang's strategem" in the novel, he might have intervened with the middle-ground stance of "protecting the border and stabilizing the people" — advocating negotiation with Cao Cao rather than decisive battle. In that case, the Battle of Chibi might have evolved into a prolonged standoff rather than a single decisive engagement, and Sun Quan would have been unable to use the victory to elevate himself to "master of all Jiangdong." Lu Su's "private counsel — one sentence" in the Jiangdongkangcaojuece may therefore be one of the most "four ounces moving a thousand pounds" moments of secret conversation in Chinese political history — it pushed the north-south division of the realm from "possible" to "inevitable."