Gu Shenwei had his own reasons for insisting on having the war start the next day, and the most important one was related to the Naihang Tribe: Zhe Su was not an ally. This message would sooner or later spread through every corner of their camp, and it would only lower their morale even further.
Dugu Xian had his own reasons, and it was also a principle he had always adhered to: attack was the best defense. Only by convincing the soldiers that the gap between their strength and the enemies' was not as large as they thought would they be able to steadfastly defend themselves until winter. Otherwise, their army might even flee upon seeing their enemies.