After the battle was over, both sides reviewed their losses.
Although it could be said a victory for the reinforcement army, the outworlder force didn't exactly come out unscathed. There were many high-level officers aside from Arther in the battle. The players had taken the brunt of their might. Out of 40,000 players under John's command, more than half were killed. They had already fallen into a chaotic situation when Arther received the order to retreat. Despite his calm exterior, John was already having a cold sweat when the horn sounded.
Luckily, players were immortal. They did lose a level, though. And half of the ones who perished opted to not join the war anymore. They figured that they would just be satisfied with their current war contribution rather than sacrificing another Amulet of Rebirth.