Noah had left the Hive for a little less than one hundred and fifty years, but the situation on the surface had changed in ways that he couldn't predict in that period.
Generally speaking, peace after every significant battle would last for a long time. They could even stretch for millennia if the balance of power among the forces didn't change.
Noah had lived through one hundred years of peace before leaving, and a hundred more had to pass before the first sign of conflict appeared on the surface.
It all began with a simple scuffle among human cultivators. Both the Hive and the Council were suppressing the Elbas family's forces on their respective borders, and casualties happened from time to time during those small battles.
The central powers didn't care about them. Human cultivators' death rarely bothered the experts in the heroic ranks, and the forces deployed there didn't hold much value in the political environment.