Fú Jiān de dàjūn zài Féishuǐ zhī zhàn zhōng cǎnbài.
His army was crushed at the Battle of the Fei River.
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history
Mostly seen as a surname. 苻坚 ruled the Former Qin and tried to unify the north, but his huge army was routed at the Battle of the Fei River, the source of the idiom about every bush and tree looking like an enemy soldier.