《史记·十二本纪·项羽本纪》
当时，项王的军队在鸿门，沛公的军队在霸上，相去四十里。
当是时，项王军在鸿门下，沛公军在霸上，相去四十里。
At that time, Lord Xiang's army was at Hongmen, while Lord Pei's army was at Baxia, forty li away.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 当是时，项王军在鸿门下，沛公军在霸上，相去四十里。 [/INST] At that time, Lord Xiang's army was at Hongmen, while Lord Pei's army was at Baxia, forty li away.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 当是时，项王军在鸿门下，沛公军在霸上，相去四十里。
user
At that time, Lord Xiang's army was at Hongmen, while Lord Pei's army was at Baxia, forty li away.
assistant