Guess

The atmosphere at the border suddenly became strange as West Xia and the Jin Kingdom went into war. West Xia accused the Jin Kingdom of violating the treaty and snatching their horses, and demanded they return them.

However, the Jin Kingdom retorted that West Xia had ambushed their guardhouse. As for the theft of the horses, they denied it entirely.

Because West Xia had lost something important, and that thing was related to the Jin Kingdom, they were especially guilty. They suspected that the Jin Kingdom had received intelligence and specially came to snatch the defensive map back.

The Third Prince of West Xia, who was tasked to bring the defensive map back, could only send people to investigate secretly while arguing with the Jin Kingdom. He firmly believed that the person who stole the horses that night was from the Jin Kingdom, or rather, their goal was not the horses at all, but the defensive map in the saddle.