Is “Defeating the Liao Kingdom” true?

In the novel, Song Jiang, following imperial orders, campaigns against the Liao and wins a great victory. The 'History of Song: Annals of Huizong' for the third year of the Xuanhe era only records that 'the Huainan bandit Song Jiang and others attacked Huaiyang Army' and were subsequently surrendered by Zhang Shuye. At that time, the Song and Liao were not at war as described in the novel; the campaign against the Liao is a fictional creation by the novelist to elevate the heroes of Liangshan.