While Sui Xiong focused on studying that tiny Underworld, the war preparations on both sides of the Main Plane gradually drew to a close.
Humanity had assembled an army of over a million. They were all strong, vigorous young men, fully armed and put through high-intensity training according to the methods of the new army. They had solid foundations and fine equipment; with some more training, they would become an excellent fighting force.
This million-strong army was no shoddy force padded out mainly with militiamen. Every one of them was a genuine soldier. To support them and provide logistical supplies, every human nation on the Main Plane had launched total mobilization. All manner of resources were saved wherever possible, converted into things useful for war, and sent steadily to the front lines.
For an army of a million to deploy in full, an enormous battlefield was naturally required. There were not many such places. The only suitable one lay in the northeast of the Main Plane, along the border between the Orc Empire and the Radiant Kingdom.
The border between the Orc Empire and the Radiant Kingdom was a vast plain. There were no famous mountains or mighty rivers there, and it was almost entirely undefended by nature. But ever since humanity had established nations there, they had continuously built fortresses and watchposts along the border, raising sturdy walls. Watchpost after watchpost, fortress after fortress, wall after wall layered upon one another, eventually forming a massive defensive system.
Compared to Earth's Great Wall, this defensive line, built entirely across plains and hills, was far more complex and garrisoned by far more soldiers. To support and supply it, countless villages were scattered like stars across the eastern side of the line, home to at least two million people. With constant support