While this entire battle between the Black Lake Sect and the Night Mountain Sect was going on, the situation at the borders between the Glerian Kingdom and the Sinyalian Kingdom was heating up as well.
It was none other than Noah's team that was directly involved in heating up this entire scenario. In comparison to large armies, his group was extremely tiny in number. However, each one possessed great power to change the flow of this battlefield.
Thus, when Noah suddenly attacked the Sinyalian Kingdom's forces, they would be forced to pull back their defense lines. Noah had attacked these forces enough times that the border army of the Sinyalian Kingdom had requested reinforcements.
Noah knew that it would take some time for them to gather reinforcements before they reach the border area. And even if they were quick enough, Noah could always have his group retreat.