《旧五代史·后唐·庄宗纪二》
这个月，契丹进入蔚州，振武军节度使李嗣本落入契丹人手中。
是月，契丹入蔚州，振武节度使李嗣本陷于契丹。
This month, the Khitan entered Weizhou, and Li Sibao, the Jiedushi of Zhenwu Army, fell into the hands of the Khitan.
<s>[INST] Kindly elucidate the central themes in this passage in English: 是月，契丹入蔚州，振武节度使李嗣本陷于契丹。 [/INST] This month, the Khitan entered Weizhou, and Li Sibao, the Jiedushi of Zhenwu Army, fell into the hands of the Khitan.</s>
Kindly elucidate the central themes in this passage in English: 是月，契丹入蔚州，振武节度使李嗣本陷于契丹。
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This month, the Khitan entered Weizhou, and Li Sibao, the Jiedushi of Zhenwu Army, fell into the hands of the Khitan.
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