Tazhong: A Strategic Location for Farming Garrisons in Longxi During the Three Kingdoms Period

Brief Introduction

Tazhong, an ancient place name, is roughly located in the area of today's Weiyuan County, Gannan Tibetan Autonomous Prefecture, Gansu Province. In Three Kingdoms history and literature, it is not merely an ordinary geographical coordinate, but the core stronghold where the Shu Han regime implemented the farming garrison policy in the Longxi region. As a hub connecting Shu and Longyou, Tazhong played a crucial role in Shu Han's strategic layout for the Northern Expeditions, serving as a key attempt to resolve the logistical crisis of the Shu army.

Core Knowledge Points

1. Strategic Function: Military Farming
Shu Han's national strength was weaker than Cao Wei, and grain transportation was the biggest bottleneck for the Northern Expeditions. The Tazhong area had fertile land and sufficient water sources. Shu Han established farming garrisons here to solve the difficulty of transporting grain for the large expeditionary army, aiming to "sustain the war through war," reduce pressure on rear transportation, and establish a forward base.
2. Geographic Significance: Longxi Barrier
Tazhong is located in the southern part of Longxi Commandery, with dangerous terrain, serving as a buffer zone contested by Wei and Shu. Controlling Tazhong could threaten Wei's Guanzhong while covering Shu Han's flank, preventing Wei forces from sneaking attacks on Hanzhong from the Longyou direction.
3. Key Figure: Jiang Wei
In the later period of Shu Han, Grand General Jiang Wei was the main executor of the Tazhong farming garrison. He trained troops and accumulated grain here to gather strength for subsequent Northern Expeditions, but also became a key target for Wei's Deng Ai to guard against surprise attacks.

Connection to "Romance of the Three Kingdoms"

In "Romance of the Three Kingdoms", Tazhong's appearance is closely centered around Zhuge Liang's Northern Expeditions and Jiang Wei inheriting his legacy, mainly concentrated in the latter part of the novel.
* Zhuge Liang's Layout: In the novel, during the fifth Northern Expedition, to defend against attacks from Wei's Sima Shi and Sima Zhao, Zhuge Liang specifically dispatched Jiang Wei to station troops in Tazhong. This plot reflects Zhuge Liang's strategic thought of "combining offense and defense," intending for Jiang Wei to stabilize the foundation in the rear.
* Jiang Wei's Persistence: After Zhuge Liang died at Wuzhang Plains, Jiang Wei did not retreat but continued to follow orders to maintain the farming garrison in Tazhong. The book describes Jiang Wei "building cities and accumulating grain" here, attempting to extend the hope of Shu Han's Northern Expeditions. This also led to Jiang Wei being put in a passive position later when Zhong Hui and Deng Ai destroyed Shu, as he was in Tazhong and could not return to aid Chengdu in time.
* Interweaving of History and Literature: Although the novel's description of Tazhong contains artistic embellishment, its core logic conforms to historical facts. Tazhong became the base for Jiang Wei's later military activities and one of the last strategic defense lines before Shu Han's fall.

Summary

Tazhong is not just a point on the map, but a symbol of the integration of military and economic efforts in the later period of Shu Han. In the narrative of "Romance of the Three Kingdoms", it witnessed Zhuge Liang's dying instructions and Jiang Wei's lonely loyalty, serving as a key geographical node for understanding the Shu-Wei confrontation pattern in the late Three Kingdoms period. For readers, understanding Tazhong helps to deeply grasp the strategic logic of Shu Han's Northern Expeditions and the root causes of their ultimate tragedy.