Years and seasons passes and their offspring created a thriving empire of their own, called Enoch, and using the technologies of their forefathers they became so powerful that even the Dark Lords feared them.
They lived on an island surrounded by an impenetrable barrier.
One of their most famous relics was their Enochian steel, impossible to break and so sharp it could cut through mountains.
That is what he remembers from the records in history books about the Enochian Empire.
The Lost Generation lived in peace and prosperity, until one bizarre, fateful day when their entire Empire sank to the bottom of the ocean.
And since then the Demon Lords began strengthening back their military and after they were sure that the Sky people would not be coming back, they began violating the Treaty of the Accord
But by this time, humanity even without the Enochian Empire is no longer as weak as they were when the First Generation arrives.