As the demon lands were being cleaned of all tribes that won't follow Kretos, the human kingdoms were also in a state of panic. Some of them decided to simply take a wait and see attitude, as they will act accordingly to the situation as it progresses. On the other hand, the other kingdoms were getting ready for war as they strengthen their defenses. Some were discussing an alliance with the neighboring kingdoms, some went so far as to discuss an alliance with the other races.
While every other kingdom was still talking about what to do next, one of the human kingdoms located near the demon lands was about ready to take action.
...
The Sliral Kingdom had been guarding the one and only path towards the demon lands for centuries. Tall Mountains separate the demon lands and the human kingdoms, the only way for land units to pass is through the Great Canyon that the Sliral Kingdom protects.
