The forward units of Rage Bear Legion had blocked the two breaches in the defensive line, which significantly impacted the battle.
From a strategic standpoint, once the gaps were plugged, the surrounding troops were no longer subject to being attacked from multiple directions. Also, as the forces from the first line of defense withdrew, they now had a route to retreat.
Even more crucial was the aspect of troop morale.
Since the outset of the battle, the human army had been continuously losing ground. Positions held by companies were wiped out entirely, while battalion and division-level positions could often only withstand a few hours of assault. The enemy was advancing as if into an uninhabited land, not just resisting; those who retreated a little slower were entirely surrounded and then lost contact. Due to this, even Army Group sectors experienced a terrifying waver.
It was a choice between annihilation and flight. With constant defeats, how could morale not be affected?