Not to mention the evacuation of the large army, there is also the issue of the safety of the population in the frontline castles. Just figuring out how to retreat everyone is a huge problem.
It must be noted that the orc army has already penetrated deep into the duchy. The moment the frontline forces leave the castle, their fate will be a pincer attack from the orc army.
To break through the orc army's chase and blockade, even if dozens of frontline forces can retreat, only one in ten will survive in the end.
Although the situation in the duchy is collapsing, the Human Alliance is already discussing sending troops. The territory we lost, we will take back one day.
For the future of the duchy, preserving vitality is extremely necessary.
Before the war, we stored a lot of food and supplies in the frontline fortresses. Even if the orc army cuts off the connection with the rear, the defenders can hold on for a while.