《资治通鉴·唐纪·唐纪三十三》
叛军将领史思明、李立节与蔡希德攻克了常山后，又率兵攻打不投降的州郡，在所经过的地方大肆杀戮，邺郡、广平、巨鹿、赵郡、上谷、博陵、文安、魏郡、信都等郡又相继落入敌手。
史思明、李立节、蔡希德既克常山，引兵击诸郡之不从者，所过残灭，于是鄴、广平、巨鹿、赵、上谷、博陵、文安、魏、信都等郡复为贼守。
After capturing Changshan, Shi Siming, Li Lixie and Cai Xide attacked non-surrendering prefectures and counties, and killed people wildly along the way. Yejun, Guangping, Julu, Zhaojun, Shanggu, Boling, Wen'an, Weijun, Xindu and other counties were captured one after another.
<s>[INST] Kindly elucidate the central themes in this passage in English: 史思明、李立节、蔡希德既克常山，引兵击诸郡之不从者，所过残灭，于是鄴、广平、巨鹿、赵、上谷、博陵、文安、魏、信都等郡复为贼守。 [/INST] After capturing Changshan, Shi Siming, Li Lixie and Cai Xide attacked non-surrendering prefectures and counties, and killed people wildly along the way. Yejun, Guangping, Julu, Zhaojun, Shanggu, Boling, Wen'an, Weijun, Xindu and other counties were captured one after another.</s>
Kindly elucidate the central themes in this passage in English: 史思明、李立节、蔡希德既克常山，引兵击诸郡之不从者，所过残灭，于是鄴、广平、巨鹿、赵、上谷、博陵、文安、魏、信都等郡复为贼守。
user
After capturing Changshan, Shi Siming, Li Lixie and Cai Xide attacked non-surrendering prefectures and counties, and killed people wildly along the way. Yejun, Guangping, Julu, Zhaojun, Shanggu, Boling, Wen'an, Weijun, Xindu and other counties were captured one after another.
assistant