《资治通鉴·后梁纪·后梁纪一》
调发山东百姓输送军粮，周德威天天派出轻骑兵抄劫，李思安于是从东南山口修筑甬道，与夹寨连接。
调山东民馈军粮，德威日以轻骑抄之，思安乃自东南山口筑甬道，属于夹寨。
He mobilized the people of Shandong to transport food supplies for the army. Zhou Dewei sent out light cavalrymen to plunder every day, so Li Si'an built a tunnel from the southeast gate to connect with Jianzhai.
<s>[INST] Kindly elucidate the central themes in this passage in English: 调山东民馈军粮，德威日以轻骑抄之，思安乃自东南山口筑甬道，属于夹寨。 [/INST] He mobilized the people of Shandong to transport food supplies for the army. Zhou Dewei sent out light cavalrymen to plunder every day, so Li Si'an built a tunnel from the southeast gate to connect with Jianzhai.</s>
Kindly elucidate the central themes in this passage in English: 调山东民馈军粮，德威日以轻骑抄之，思安乃自东南山口筑甬道，属于夹寨。
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He mobilized the people of Shandong to transport food supplies for the army. Zhou Dewei sent out light cavalrymen to plunder every day, so Li Si'an built a tunnel from the southeast gate to connect with Jianzhai.
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