《辽史·列传·卷十四》
乾亨初，宋军再度北侵，耶律沙率兵抄小路到白马岭，隔着大涧遭遇敌军。
乾亨初，宋复北侵，沙将兵由间道至白马岭，阻大涧遇敌。
At the beginning of the Qianheng reign, the Song army invaded the north again, and Yelu Sha led his troops to take a small road to Baimaling, encountering the enemy across a large stream.
<s>[INST] Translate the following Classical Chinese text into English: 乾亨初，宋复北侵，沙将兵由间道至白马岭，阻大涧遇敌。 [/INST] At the beginning of the Qianheng reign, the Song army invaded the north again, and Yelu Sha led his troops to take a small road to Baimaling, encountering the enemy across a large stream.</s>
Translate the following Classical Chinese text into English: 乾亨初，宋复北侵，沙将兵由间道至白马岭，阻大涧遇敌。
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At the beginning of the Qianheng reign, the Song army invaded the north again, and Yelu Sha led his troops to take a small road to Baimaling, encountering the enemy across a large stream.
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