A massive army typically takes a long time to mobilize and slowly probe before a battle can be engaged. Even after fighting to a certain extent, both sides may sit down for negotiations. That's the normal course of battle.
Du You clearly wasn't from this world, and he couldn't care less about its rules of warfare.
To Du You, what mattered in battle was to inflict as much damage as possible on the enemy's living forces. He had no concern for whether killing opposing fifth-tier high-ranking fighters would offend many within the upper class.
This time, no one knew what price the royal family had paid or what benefits it had promised to be able to mobilize so many fifth-tier professionals. Such a gathering signaled the mobilization of the entire nation's strength. Without the backing of the royal family, it would have been impossible to gather so many high-ranking fighters.
