According to the "Supreme Agreement," humanity could deploy a maximum of three corps in each Abyssal Plane. The number of powerhouses in each corps was also strictly limited.
As the great battle unfolded, humanity, having recuperated for years, launched an offensive targeting the four major Abyssal Planes.
Their ambition was clear for all to see. This battle wasn't just against the demon gods but also aimed at the Abyssal Planes that the demon creatures depended on for survival!
If they only killed the demon gods, the Abyssal Planes would soon give birth to new Primordial Demon Gods. Even in Abyssal Planes occupied by Exiled Demon Gods, the same would happen.
The only way to achieve lasting peace was to kill all demon creatures, purify the Abyssal Planes, and destroy them completely!
However, the "Supreme Agreement" made it difficult for humanity to achieve this.