《资治通鉴·宋纪·宋纪十三》
叛军首领孔觊的部将孙昙、程宗修筑五个城堡，互相连接。
孔凯将孙昙扞、程扞宗等列五城，互相连带。
The generals Sun Dan and Cheng Zong, subordinates of rebel leader Kong Ke, built five fortresses, which were connected to each other.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 孔凯将孙昙扞、程扞宗等列五城，互相连带。 [/INST] The generals Sun Dan and Cheng Zong, subordinates of rebel leader Kong Ke, built five fortresses, which were connected to each other.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 孔凯将孙昙扞、程扞宗等列五城，互相连带。
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The generals Sun Dan and Cheng Zong, subordinates of rebel leader Kong Ke, built five fortresses, which were connected to each other.
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