《南史·列传·卷七十八》
陈檀请官军去征讨那些没有归附者。于是任命他为高兴郡太守，派前朱提郡太守费沈、龙骧将军武期南伐，并打通朱崖的道路，都未能成功。他们私自杀了陈檀回兵，费沈被下狱死去。
檀乞官军征讨未附，乃以檀爲高兴太守，遣前朱提太守费沈、龙骧将军武期南伐，并通朱崖道，并无功，辄杀檀而反，沈下狱死。
Chen Tan requested that the imperial army go and subdue those who had not yet pledged allegiance. Thus, he was appointed as Taishou of Gaoxing Commandery and Fei Shen, the former magistrate of Zhu Ti Commandery, and Longxiang General Wu Qi were sent to the south to conduct a punitive expedition and conquer Zhu Ya, but neither one of them succeeded. They returned their troops after killing Chen Tan and Fei Shen was imprisoned and died.
<s>[INST] Kindly elucidate the central themes in this passage in English: 檀乞官军征讨未附，乃以檀爲高兴太守，遣前朱提太守费沈、龙骧将军武期南伐，并通朱崖道，并无功，辄杀檀而反，沈下狱死。 [/INST] Chen Tan requested that the imperial army go and subdue those who had not yet pledged allegiance. Thus, he was appointed as Taishou of Gaoxing Commandery and Fei Shen, the former magistrate of Zhu Ti Commandery, and Longxiang General Wu Qi were sent to the south to conduct a punitive expedition and conquer Zhu Ya, but neither one of them succeeded. They returned their troops after killing Chen Tan and Fei Shen was imprisoned and died.</s>
Kindly elucidate the central themes in this passage in English: 檀乞官军征讨未附，乃以檀爲高兴太守，遣前朱提太守费沈、龙骧将军武期南伐，并通朱崖道，并无功，辄杀檀而反，沈下狱死。
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Chen Tan requested that the imperial army go and subdue those who had not yet pledged allegiance. Thus, he was appointed as Taishou of Gaoxing Commandery and Fei Shen, the former magistrate of Zhu Ti Commandery, and Longxiang General Wu Qi were sent to the south to conduct a punitive expedition and conquer Zhu Ya, but neither one of them succeeded. They returned their troops after killing Chen Tan and Fei Shen was imprisoned and died.
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