The Three Gorges are a strategically important route into Shu, and in the novel they become one of the approaches through which a coordinated invasion might threaten the kingdom. Their significance lies less in a separately narrated local episode than in their place within the wider geography of alliance, defense, and competing claims to power.

Strategic Geography

The Three Gorges appear in Sima Yi’s proposal for a five-army attack on Shu after Xuande’s death. He assigns the army recruited from Wu the task of advancing through the Three Gorges, alongside an attack on Fucheng. The passage is thus presented as one front in a plan designed to stretch Kong Ming’s defenses across several directions, rather than as an isolated battlefield.

The plan’s geography connects Wu’s participation to the threat against Shu. The Three Gorges form part of an approach from the east, while other forces are to advance from the north and west. Their mention helps show how the invasion depends on coordinating forces drawn from different political powers and directing them toward distinct routes.

Political Stakes

The proposed use of the Three Gorges is bound up with Sun Quan’s shifting relationship to Wei and Shu. Sima Yi’s plan offers Sun Quan land in return for committing an army against Shu. The route therefore represents more than a military corridor: its threatened use expresses the attempt to turn political accommodation between Wu and Wei into pressure on Shu.

That prospect follows a failed diplomatic effort to dissuade Xuande from attacking Wu. Zhuge Jin urges him to redirect his campaign against Wei, arguing that restoring the Han should take precedence over a personal oath and the dispute over Jingzhou. Xuande rejects the appeal, and Zhuge Jin returns to report his failure. Against this background, the Three Gorges become part of the projected eastern threat that could make Shu’s conflict with Wu consequential far beyond the question of territory.

Narrative Function

The Three Gorges are named within a larger strategic design, not described through a narrated battle there. Their role is anticipatory: the invasion plan maps potential pressure points before the account turns to the response of Shu’s court and Kong Ming. The passage makes the landscape legible as a network of routes and fronts, where control of a passage can serve an alliance’s larger purpose.

The plan also clarifies the vulnerability created by Xuande’s death. Cao Pi approves the proposal and orders messengers dispatched, prompting alarm in Shu when reports arrive that five armies are being mobilized. The Three Gorges thus enter the narrative as one component of a looming, multi-directional danger, linking physical access to the political choices that determine who may use it.