The Hou Yin Rebellion: The Wancheng Mutiny of Jian'an Year 23 and Cao Cao's Rear Crisis

Brief Introduction

The Hou Yin Rebellion occurred in the 23rd year of Jian'an (218 AD), representing a significant military mutiny within the rear of Cao Cao's regime during the Three Kingdoms period. At the time, Cao Cao was engaged in a strategic decisive battle against Liu Bei in Hanzhong (present-day Hanzhong, Shaanxi), with his main forces on a western expedition, leaving the rear defenses thinly manned. General Hou Yin, stationed in Wancheng (present-day Nanyang, Henan), seized the opportunity to rebel against Cao Cao, attempting to respond to Liu Bei's forces. Although this rebellion was suppressed quickly, it forced Cao Cao to maneuver troops with difficulty between strategic locations, profoundly influencing the course of the Hanzhong campaign.

Core Knowledge Points

* Time and Location: Jian'an Year 23, Wancheng (a strategic hub under Cao Cao's control, connecting Luoyang and Jingzhou).
* Key Figures: Rebel general Hou Yin, King of Wei Cao Cao, suppression general Xiahou Yuan.
* Background: Cao Cao's western expedition to Hanzhong left rear defenses weak; Liu Bei's forces attempted to subvert internal generals of Cao Cao.
* Process: Hou Yin rebelled holding Wancheng; upon learning of this, Cao Cao urgently ordered front-line general Xiahou Yuan to return and suppress the rebellion.
* Outcome: Xiahou Yuan arrived with troops, Hou Yin was defeated and killed, and Wancheng returned to Cao Cao's control.
* Strategic Impact: Tied up Cao Cao's mobile forces, intensified pressure on the Hanzhong battlefield, and was one of the诱因 (inducements) for Cao Cao's retreat from Hanzhong.

Connection with Zizhi Tongjian Content

In Volume 66 of the Zizhi Tongjian, Sima Guang placed the "Hou Yin Rebellion" within the macro-narrative context of the Battle of Hanzhong. The book records: "Lord Cao was in Hanzhong, Hou Yin rebelled in Wancheng." This phrasing was not an isolated record but intended to highlight Cao Cao's dilemma of "fighting on two fronts" at the time.

Through this event, Sima Guang revealed the hidden instability within Cao Cao's regime during its rapid expansion. The book details how Cao Cao, upon learning of the rebellion, was forced to withdraw Xiahou Yuan from the Hanzhong front to reinforce Wancheng. This maneuver directly weakened the offensive against Liu Bei at the front. The Zizhi Tongjian uses this event to construct a rigorous causal chain: rear rebellion led to insufficient front-line forces, which led to the loss of Hanzhong, ultimately contributing to Liu Bei occupying Ba-Shu and the initial formation of the tripartite division of the empire.

Furthermore, the Zizhi Tongjian indirectly reflects the united front capabilities of Liu Bei's group and the fluctuation of loyalty among generals within Cao Cao's camp during the chaotic times. Sima Guang used this to warn future generations: governing the country and pacifying the world requires not only victory on the battlefield but also stability at the rear.

Historical Insights

Although the Hou Yin Rebellion was a local mutiny, it was a key interlude in the turning point of the mid-Three Kingdoms period. It proved that in large-scale warfare, rear stability is as important as front-line victory. For those studying Three Kingdoms history and the chronological logic of the Zizhi Tongjian, this event provides an important perspective for understanding Cao Cao's strategic dilemmas.

Keywords: Hou Yin Rebellion, Jian'an Year 23, Zizhi Tongjian, Cao Cao, Liu Bei, Hanzhong Campaign, Three Kingdoms History