There were some things that one did not know the reason for unless they had personally experienced it.
For example, Kang De finally understood why the army was unwilling to fight at night.
With just the torches, braziers, and illumination spells of the mages, it was impossible to create light as bright as day.
Darkness was darkness, hiding everything outside their vision. The fear of darkness was branded in the genes of every intelligent creature, causing a huge sense of oppression and fear. Darkness hid the unknown, and darkness meant danger. That was why people yearned for light and used flames.
War was terrifying, but war that began at night was even more terrifying.