《明史·列传·卷三十四》
李景隆进攻北平，燕兵自大宁回救。
李景隆攻北平，燕师自大宁还救。
Li Jinglong attacked Beiping and the Yan army returned to rescue from Daning.
<s>[INST] Kindly elucidate the central themes in this passage in English: 李景隆攻北平，燕师自大宁还救。 [/INST] Li Jinglong attacked Beiping and the Yan army returned to rescue from Daning.</s>
Kindly elucidate the central themes in this passage in English: 李景隆攻北平，燕师自大宁还救。
user
Li Jinglong attacked Beiping and the Yan army returned to rescue from Daning.
assistant