《资治通鉴·宋纪·宋纪十三》
豫州长史杜叔宝认为官军驻扎历阳，不能马上向前推进。刘等人到达后，历阳部队上下惊恐震动。
杜淑宝谓台军住历阳，不能遽进；及刘勔等至，上下震恐。
The governor of Yu Province, Du Shubaobao, believed that the imperial army was stationed at Liyang and could not advance immediately. After Liu and the others arrived, the troops at Liyang were shocked and shaken.
<s>[INST] Kindly elucidate the central themes in this passage in English: 杜淑宝谓台军住历阳，不能遽进；及刘勔等至，上下震恐。 [/INST] The governor of Yu Province, Du Shubaobao, believed that the imperial army was stationed at Liyang and could not advance immediately. After Liu and the others arrived, the troops at Liyang were shocked and shaken.</s>
Kindly elucidate the central themes in this passage in English: 杜淑宝谓台军住历阳，不能遽进；及刘勔等至，上下震恐。
user
The governor of Yu Province, Du Shubaobao, believed that the imperial army was stationed at Liyang and could not advance immediately. After Liu and the others arrived, the troops at Liyang were shocked and shaken.
assistant