The over reliance of the Undead Calamity on its mastermind dealt it a solid wound. Following the fall of the Lich, Carlohin's Undead army falls apart.
In our eyes as ex-Undead Lords, this shows that the army's structure is extremely chaotic. The more mature an Undead army is, the more Middle-tier and High-tier Undead they would have. With more middle-level commanders within the army, the low-tier cannon fodders would be able to exert a greater impact on the battlefield through their leadership. They would also be even less fearful of getting killed.
