The location they chose was arguably the closest place to Guanghan City suitable for establishing a camp.
Of course, this wasn't because there weren't better locations up ahead, but because their numbers were simply too large.
Their mercenaries and soldiers combined numbered a staggering 35,000. For the zombies, the concentrated aura of so many living people gathered in one place would be like a beacon in the dead of night.
If they pushed any closer, they risked attracting the vast zombie hordes from within Guanghan City, which would ultimately form a zombie tide.
Moreover, a spontaneously formed tide like that was on a completely different scale from one triggered by a Mutated Zombie.
Given the sheer number of Zombies in Guanghan City, it wouldn't be surprising at all if it triggered a massive tide of over ten million.
That was precisely why they stopped 10 kilometers out.
