Very soon, Du You confirmed that the Beastmen had indeed all left. In just three days, the entire battlefield had returned to its previous state of tranquility. Most of the Beastmen had retreated back.
Of course, some lower-level Beastmen stayed in this world, but no one bothered to clear them out.
They were simply too scattered, and this world originally had Beastmen, so it was impossible to distinguish who had stayed behind. Every time the Beastman world attacked another world, some would remain in the end.
Some had strayed too far and did not receive the retreat message. Others were intercepted and couldn't return in time. Some didn't fare well in the Beastman world and wanted to seize this opportunity to leave.
In short, these Beastmen would eventually reproduce and spread after staying, which is how many worlds ended up with Beastmen.
