《明史·列传·卷一百六十八》
大清兵得知腾蛟进入这座空城，就派遣将领李勇引兵进城。
大兵知腾蛟入空城，遣将徐勇引军入。
When the Qing army learnt that Tengjiao had entered the empty city, they sent general Li Yong to lead troops into the city.
<s>[INST] Kindly elucidate the central themes in this passage in English: 大兵知腾蛟入空城，遣将徐勇引军入。 [/INST] When the Qing army learnt that Tengjiao had entered the empty city, they sent general Li Yong to lead troops into the city.</s>
Kindly elucidate the central themes in this passage in English: 大兵知腾蛟入空城，遣将徐勇引军入。
user
When the Qing army learnt that Tengjiao had entered the empty city, they sent general Li Yong to lead troops into the city.
assistant