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A series of three military campaigns launched by Huan Wen, a powerful general and de facto ruler of the Eastern Jin dynasty, between 354 and 369 CE, aimed at recovering the Central Plains from non-Han regimes that had occupied northern China after the collapse of Western Jin.
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In the first month of 191, Yuan Shao and Han Fu, arguing that Emperor Xian was too young and under Dong Zhuo’s control, proposed proclaiming Liu Yu, the Governor of Youzhou and a respected member of the imperial clan, as the new emperor. However, both Cao Cao and Yuan Shu strongly opposed the move,…