淝水之戰
In summer 375, Wang grew ill. In order to try to appease the spirits to save Wang's life, Fu Jiān ordered a general pardon. However, by autumn, Wang was near death. On his deathbed, he warned Fu Jiān against campaigns to conquer Eastern Jin, and stated that he believed that the Xianbei (the people of Former Yan's nobility) and the Qiang would create trouble in the future and should be watched against. He then died. However, Fu Jiãn failed to take in this last advice, and launched a major offensive against Eastern Jin in the autumn of 383, but was badly defeated at the Battle of Fei River in winter that year, severely weakening Former Qin and eventually led to its collapse in 394.