Along the lengthy border line.
Tens of Human Race Sovereigns, day after day, held aloft the Great Sun transformed by Shocking Deity Gaze, shining upon the Human Realm, using the Power of Heavenly Dao to dissolve the Bloodline Curse within the bodies of the Demon Race, augmented by the might of the Sovereigns, and with the many Golden Core Nascent Soul cultivators summoned from the rear, the recovery of territories had become relatively easy.
Without the existence of the Bloodline Curse, even the lower-ranking demon beasts with lesser intelligence had survival instincts taking over.
Facing the threat of death, they would actively flee the dangerous zones, rather than, as before, simply seeking death under the compulsion of the Bloodline Curse.
As time passed, the Solidary Frontline Fortress, which once stood isolated, gradually broke free from its shackles, began to cooperate with the cultivators in the rear to recover lost land, and to spread the name of Great Love.