In this fierce battle, apart from the high-end battlefield tens of kilometers above the ground where dozens of kings and demon kings fought, the number of soldiers gathered on the front line was like an ocean.
For example, by mobilizing 13 legions of the Human Race, the number of soldiers exceeded one million, while the Purgatory Demon Race deployed over four million soldiers with dozens of legions.
Moreover, each of these "people" had a strength above the Fourth Layer Heaven, with countless high-ranking powerhouses.
Aside from that, there were also many Giant Beast Level demonic beasts on the opposite side, their power terrifying.
If it weren't for the thousands of super-caliber artillery positions built by humans, as well as hundreds of thousands of drones, energy bombers, and various missiles carrying nuclear and hydrogen warheads at their disposal, they might not be able to hold off the enemy's advance.