《宋史·列传·卷一百二十》
金人到金牛时，宋军掩击，斩敌及坠入溪谷而死者有数千人。
金人至金牛，宋师掩击之，斩馘及堕溪谷死者，以数千计。
When the Jurchens arrived at Jinniu, the Song army struck them, killing the enemy and causing thousands to fall into the ravine and die.
<s>[INST] Kindly elucidate the central themes in this passage in English: 金人至金牛，宋师掩击之，斩馘及堕溪谷死者，以数千计。 [/INST] When the Jurchens arrived at Jinniu, the Song army struck them, killing the enemy and causing thousands to fall into the ravine and die.</s>
Kindly elucidate the central themes in this passage in English: 金人至金牛，宋师掩击之，斩馘及堕溪谷死者，以数千计。
user
When the Jurchens arrived at Jinniu, the Song army struck them, killing the enemy and causing thousands to fall into the ravine and die.
assistant