《北史·列传·卷四十二》
六月，齐军围攻定阳；七月，消灭了定阳外城的敌人。
六月，徙围定阳。七月，屠其外城。
In June, the Qi army besieged Dingyang; in July, they annihilated the enemy outside Dingyang's outer city.
<s>[INST] Kindly elucidate the central themes in this passage in English: 六月，徙围定阳。七月，屠其外城。 [/INST] In June, the Qi army besieged Dingyang; in July, they annihilated the enemy outside Dingyang's outer city.</s>
Kindly elucidate the central themes in this passage in English: 六月，徙围定阳。七月，屠其外城。
user
In June, the Qi army besieged Dingyang; in July, they annihilated the enemy outside Dingyang's outer city.
assistant