《宋书·列传·卷八十八》
景和元年，道固出外当宁朔将军、冀州刺史，镇守历城。
景和元年，出为宁朔将军、冀州刺史，镇历城。
In the first year of Jinghe, Dao Gu went out to serve as the general of Ningshuo and the governor of Jizhou, guarding Licheng.
<s>[INST] Kindly elucidate the central themes in this passage in English: 景和元年，出为宁朔将军、冀州刺史，镇历城。 [/INST] In the first year of Jinghe, Dao Gu went out to serve as the general of Ningshuo and the governor of Jizhou, guarding Licheng.</s>
Kindly elucidate the central themes in this passage in English: 景和元年，出为宁朔将军、冀州刺史，镇历城。
user
In the first year of Jinghe, Dao Gu went out to serve as the general of Ningshuo and the governor of Jizhou, guarding Licheng.
assistant