Long'an Year 2: Northern-Southern Rivalry and the Crisis of Eastern Jin (398 AD)

Brief Introduction

Long'an Year 2, corresponding to 398 AD, was the era name of Emperor An of Eastern Jin, Sima Dezong. This year holds a turning point in Chinese history: in the North, Tuoba Gui formally declared himself emperor, establishing the prototype of the Northern Wei regime; in the South, the power of the Eastern Jin warlord Huan Xuan expanded, while Sima Yuanxian was powerless to counterbalance him. In the Zizhi Tongjian (Comprehensive Mirror in Aid of Governance), this year marks the acceleration of the Northern unification process in the late Sixteen Kingdoms period and the prelude to the internal collapse of the Eastern Jin dynasty. It is a key node for understanding the formation of the Northern and Southern Dynasties confrontation.

Core Knowledge Points

* Timeframe: 398 AD, the year of Wu Yin in the sexagenary cycle.
* Political Landscape:
* North: The ruler of the Dai Kingdom, Tuoba Gui, declared himself emperor in Pingcheng, changed the state name to Wei (known historically as Northern Wei), and ended the history of the Dai Kingdom.
* South: Internal strife within the Eastern Jin court intensified, and the conflict between Sima Yuanxian and Huan Xuan escalated. Huan Xuan was appointed Inspector of Jing Province, gaining control over heavy military forces and forming a separatist power.
* Key Figures: Emperor An of Jin (Puppet), Huan Xuan (Ambitious Figure), Tuoba Gui (Founder), Sima Yuanxian (Powerful Minister).

Connection with Zizhi Tongjian

In Zizhi Tongjian, Volume 108, Sima Guang's record of Long'an Year 2 focuses on the evolution of "momentum" (势), showcasing historical trends through a North-South comparison.

1. Foundation of Northern Wei: The book details how Tuoba Gui established the capital at Pingcheng, reformed administration, and appointed officials. Sima Guang uses this to imply that the Northern regime was gradually becoming standardized, possessing the political foundation to unify the North.
2. Decline of Eastern Jin: It records Huan Xuan entering Jing Province to govern, while Sima Yuanxian attempted to reduce feudal powers but was instead constrained. Zizhi Tongjian reveals the cruel reality of the Eastern Jin imperial power falling aside and the game between aristocratic clans and warlords through the personnel appointments of this year. Huan Xuan's expansion is viewed as the direct fuse for the fall of Eastern Jin.
3. Narrative Perspective: Sima Guang juxtaposes the rise of Northern Wei with the chaos of Eastern Jin, highlighting the historical trend of "Northern strength and Southern decline." Although the book does not directly comment, the narrative order implies a shift in political legitimacy.

Historical Significance

Long'an Year 2 was the prelude to the fall of Eastern Jin. Huan Xuan's rise directly led to Liu Laozhi's defection the following year (Long'an Year 3) and the subsequent establishment of the Huan Chu regime. Simultaneously, the establishment of Northern Wei opened a new chapter in the Northern and Southern Dynasties confrontation. For readers studying the transition of Chinese medieval history, this year is a key node for understanding the succession of Northern and Southern regimes and the end of aristocratic politics. Through the records in Zizhi Tongjian, we can clearly see the interweaving of personal ambition and the grand trends of the era within the torrent of history.