《左传·襄公·襄公十年》
莒国人钻了诸侯有战事的空子，所以进攻我国东部边境。
莒人间诸侯之有事也，故伐我东鄙。
The people of Ju took advantage of the war between the princes and attacked our eastern border.
<s>[INST] Kindly elucidate the central themes in this passage in English: 莒人间诸侯之有事也，故伐我东鄙。 [/INST] The people of Ju took advantage of the war between the princes and attacked our eastern border.</s>
Kindly elucidate the central themes in this passage in English: 莒人间诸侯之有事也，故伐我东鄙。
user
The people of Ju took advantage of the war between the princes and attacked our eastern border.
assistant