The Han Campaign against Dayuan: Li Guangli's Expedition and the Historical Truth Behind the Ferghana Horses

Brief Introduction

The Han Campaign against Dayuan was a major military operation during the reign of Emperor Wu of the Western Han Dynasty, occurring between 104 BC and 101 BC. The core objective of this war was to acquire the "Ferghana Horses" (known as "Sweating Blood Horses") from the Kingdom of Dayuan (located in today's Ferghana Valley in Central Asia) to strengthen the Han cavalry against the Xiongnu. Emperor Wu dispatched General of Ershi, Li Guangli, to lead a massive army on an expedition. After two campaigns, the Han forces eventually forced Dayuan to submit. This campaign not only altered the political landscape of Central Asia but also marked the formal penetration of Han influence into the heartland of the Western Regions, serving as a critical node in the history of the Silk Road.

Core Knowledge Points

1. Causes of the War: Emperor Wu sent envoys to request horses, but the King of Dayuan killed the Han envoys and refused to sell the horses. To establish prestige in the Western Regions, the Emperor decided to launch a military expedition.
2. Two Expeditions:
* First Expedition (104 BC): Li Guangli led an army of 10,000 men. Due to insufficient supplies and border closures by smaller states along the route, the army suffered heavy losses and returned without achieving its objective.
* Second Expedition (102 BC): The Emperor dispatched an additional 60,000 troops, carrying large amounts of grain and craftsmen. Li Guangli breached the capital of Dayuan, Guishan City. The nobility of Dayuan installed a new pro-Han king and presented 3,000 horses.
3. Strategic Significance: The Han Dynasty acquired high-quality breeding horses (known as "Heavenly Horses"), enhancing the mobility of their cavalry. Simultaneously, it intimidated various states in the Western Regions, established Han dominance in the area, and facilitated the smooth flow of the Silk Road.
4. Cost and Controversy: The war consumed enormous resources, with over half of the soldiers perishing. This sparked domestic criticism of Emperor Wu's aggressive militarism, reflecting the livelihood costs behind Han expansion.

Connection with the "Records of the Grand Historian" (Shiji)

Sima Qian recorded this event in detail in the Biography of Dayuan within the Shiji. As a historian who aimed to "investigate the relationship between heaven and man, and understand the changes from past to present," Sima Qian not only documented the course of the war but also retained a critical perspective.

Historical Value: The Biography of Dayuan* is a primary source for studying Han policies toward the Western Regions. It provides detailed descriptions of the geography, customs, and war details along the route, serving as a key text for understanding Han cognition of Central Asia.
* The Historian's Style: Sima Qian implicitly questioned the cost of the war in his writing. He recorded Li Guangli being punished by Emperor Wu for failing to obtain the horses, as well as the tragedy of "more than half the soldiers dying" during the expedition, reflecting the livelihood costs behind Han expansion.
Historical Positioning: This event is corroborated with the Biography of Xiongnu in the Shiji*, showcasing a side of the Han-Xiongnu game. It illustrates the strategy of cutting off the Xiongnu's right arm by controlling the source of the Western Regions, constructing a macro geo-political picture.

Historical Impact

Although the Han Campaign against Dayuan was an expedition fought for horses, its impact extended far beyond the military realm. It accelerated the exchange of species and culture between the East and the West. The introduction of Ferghana horses improved the horse breeds in the Central Plains, while Han prestige ensured the prosperity of the Silk Road for centuries. This historical event is both a testament to the strength of the Han Dynasty and a classic case of ancient geo-political gaming, providing important evidence for future generations to understand the history of Sino-Western exchange.