《资治通鉴·汉纪·汉纪四十六》
闰正月，西羌的残余部众，再度与烧何种的大豪帅联合攻打张掖郡。早晨，逼进护羌尉段的军营。
闰月，西羌馀众复与烧何大豪寇张掖，晨，薄校尉段颎军。
During the intercalary first month, the remaining forces of the Western Qiang once again joined forces with the great leader of the Shao tribe to attack Zhangye prefecture. In the morning, they approached the military camp of the Protector of Qiang, Duan.
<s>[INST] Kindly elucidate the central themes in this passage in English: 闰月，西羌馀众复与烧何大豪寇张掖，晨，薄校尉段颎军。 [/INST] During the intercalary first month, the remaining forces of the Western Qiang once again joined forces with the great leader of the Shao tribe to attack Zhangye prefecture. In the morning, they approached the military camp of the Protector of Qiang, Duan.</s>
Kindly elucidate the central themes in this passage in English: 闰月，西羌馀众复与烧何大豪寇张掖，晨，薄校尉段颎军。
user
During the intercalary first month, the remaining forces of the Western Qiang once again joined forces with the great leader of the Shao tribe to attack Zhangye prefecture. In the morning, they approached the military camp of the Protector of Qiang, Duan.
assistant