《左传·宣公·宣公十三年》
十三年春季，齐国军队攻打莒国。
十有三年春，齐师伐莒。
In the spring of the thirteenth year, the Qi army attacked the State of Ju.
<s>[INST] Kindly elucidate the central themes in this passage in English: 十有三年春，齐师伐莒。 [/INST] In the spring of the thirteenth year, the Qi army attacked the State of Ju.</s>
Kindly elucidate the central themes in this passage in English: 十有三年春，齐师伐莒。
user
In the spring of the thirteenth year, the Qi army attacked the State of Ju.
assistant