《宋史·列传·卷十七》
这天夜晚，吴人果然来攻水营，未能成功。
是夜，吴人果来攻砦，不能克。
That night, the Wu army came to attack the troop but did not succeed.
<s>[INST] Convert the following modern Chinese text into Classical Chinese: 这天夜晚，吴人果然来攻水营，未能成功。 [/INST] 是夜，吴人果来攻砦，不能克。</s>
Convert the following modern Chinese text into Classical Chinese: 这天夜晚，吴人果然来攻水营，未能成功。
user
是夜，吴人果来攻砦，不能克。
assistant