Two armored forces were making simultaneous headway on both sides of the canal, simply unstoppable.
In Bai Zhizhan's view, the Tiaoman army had suddenly become proactive, not because they had a change of heart, but because they didn't want to let the Imperial Army control the Xifan Canal. Once they controlled the strategic channel connecting both oceans, they'd be able to freely access the Land Heart Sea and even send troops to the North Xuan region.
With the current situation, especially after the Imperial Army had dispatched troops to Boss Bay and, with the help of the Ter Republic, began moving west, no one could prevent the Empire from reaching into the Land Heart Sea. However, from the standpoint of the Tiaoman Empire, maintaining supremacy in the North Xuan region was crucial no matter what.
If the Imperial Army were to enter the North Xuan region, the Tiaoman military would probably be sidelined.