Qianyuan Year 2: A Critical Turning Point in the An Lushan Rebellion

Brief Introduction

Qianyuan Year 2, corresponding to 759 AD, was the third year of Emperor Suzong Li Heng's reign. By this time, the "An Lushan Rebellion" had erupted four years prior. Although the Tang Dynasty had successfully recaptured Chang'an and Luoyang in Qianyuan Year 1 (758 AD), remnants of the rebel forces still occupied Hebei, and their roots remained unremoved. Qianyuan Year 2 was the key node where the pacification war shifted from strategic counter-offensive to strategic stalemate. This year, the main Tang forces suffered a disastrous defeat at Yecheng, causing drastic fluctuations in the war situation, which profoundly affected the political landscape and military trajectory of the mid-Tang Dynasty. The changes in this year directly led to the formation of the warlordism situation in the following decade.

Core Knowledge Points

* Time Node: 759 AD, Lunar Year of Jihai.
Major Battle: Battle of Yecheng (Battle of Xiangzhou). Tang forces assembled nine Jiedushi* (Military Governors), including Guo Ziyi, to besiege An Qingxu at Yecheng. However, due to the supervision of Eunuch Yu Chaoren and a lack of unified command, they were defeated and scattered after encountering Shi Siming's reinforcements, losing all supplies.
* Rebel Movements: An Lushan's son, An Qingxu, was in a desperate situation. Shi Siming switched from submitting to Tang to rebelling again, killed An Qingxu, and proclaimed himself Emperor of Great Yan. The rebel forces gained a breather and grew strong again.
* Era Name Change: At the end of Qianyuan Year 2, Emperor Suzong issued an edict to change the era name to "Shangyuan". The following year became the first year of Shangyuan, marking the end of the Qianyuan era.

Connection with "Zizhi Tongjian"

In Sima Guang's Zizhi Tongjian (Comprehensive Mirror in Aid of Governance), the records of Qianyuan Year 2 are mainly concentrated in Volumes 220 to 221. Sima Guang used the chronological style and did not stop at war records, but focused more on "lessons":

1. Struggle for Command: The book analyzes the root cause of the Tang defeat: Suzong's unwillingness to grant unified command to generals like Guo Ziyi, instead trusting Eunuch Yu Chaoren. This reveals the underlying risks of eunuch power in the mid-to-late Tang Dynasty.
2. Public Sentiment: Sima Guang recorded that after Shi Siming's rebellion, the people of Hebei still suffered from war, reflecting the long-term damage of the An Lushan Rebellion on people's livelihood.
3. Political Reflection: By recording Suzong's decision-making errors during this year, Sima Guang warned future monarchs to employ people wisely and avoid internal friction leading to unresolved external threats. When narrating the defeat at Yecheng, Sima Guang specifically included the chaotic scenes of generals like Li Guangbi retreating, highlighting institutional defects.

Historical Significance

The defeat in Qianyuan Year 2 forced the Tang Dynasty's pacification process to interrupt, extending the An Lushan Rebellion until 763 AD. This year was not only a military turning point but also a microcosm of the intensified struggle between centralization and regional warlord power during the Tang Dynasty's decline from prosperity. Understanding Qianyuan Year 2 helps gain deep insight into the complex threads of mid-Tang history.