Late at night, on Wayne Mountain.
I have to admit, while those Beastmen weren't particularly skilled, they certainly knew how to pick a location.
Wayne Mountain was a textbook example of a place that was easy to defend and hard to attack. If the Beastman commander hadn't suffered a moment of madness and concocted the "brilliant" plan of actively sallying out to meet the enemy beyond the gates, Robson's victory certainly wouldn't have been so effortless.
Conveniently, the Beastmen had already built a camp on Wayne Mountain. After a forced march through the night, Robson and his soldiers were in desperate need of rest. So, Robson led his army right in and made themselves at home.
In the midst of his sleep, Robson groggily heard footsteps outside. His instincts as a Golden Tier expert snapped him wide awake in an instant.
A Golden Eighth Tier's Divine Sense was a significant improvement over that of a Golden Seventh Tier.
