"The reason is fairly simple," Edith resumed before anyone could raise a question. "The Cage Mountain is not only a branch of the Impassable Mountain Range in the horizontal direction but also the highest point of the Kingdom of Dawn. The artillery of the First Army could have a broader view if they fire from there. Also, the demons will have restricted mobility, considering that there are fewer flying Devilbeasts than inferior Mad Demons."
"Secondly, the Red Mist tends to move toward the lowlands, and it becomes thinner as it stretches farther. Therefore, the witches shall build the defensive line at the highpoint of the land. I've heard that the front has already done so ahead of time."
"The last is His Majesty's Radiation Project." She surveyed the room at these words and continued, "We know that this project relies on the ores at the Cage Mountain. Before we find an alternative resource, we can't abandon the Cage Mountain."