At O'Neil Castle, the pressure had recently eased significantly with the arrival of winter, coupled with Prince Kase moving the bulk of his forces to the front lines at Devil City.
However, even with the reduced pressure, the military supplies in O'Neil Fortress were insufficient for the nobles within to hold out much longer. Moreover, according to reports from Devil City, the situation there was also dire.
Prince Kase was clearly preparing to cut off Devil City's supply lines and might even launch a surprise attack on Thermopylae with a special detachment.
At that point, Devil City would truly be in no position to help Prince Noah.
The allied forces meant to relieve O'Neil Castle were already on the move. This relief force was likely Prince Noah's last hope. If the breakout failed, he would not retreat back into O'Neil Castle. Such an act would be meaningless and would only cause more trouble for the Kingdom.
