Mortal wars often have a limited duration; both sides inevitably end the conflict when they cannot afford the losses.
After all, war is a consumption of comprehensive national strength. Whoever cannot afford it first loses everything... However, when both sides have accumulations and logistics from several planes, it's possible that the casualties on the frontline are outpaced by the rate of troop replacement, and the resources used up are less significant than the stimulation of a wartime economy.
"Centuries of war, even millennia of war, are bearable for superpowers..."
What was a localized conflict has evolved into total war, and the entire frontline has a completely different look.
Easterners' Military Region, Long Hand Tribe Military Region, and Fishman Military Region extensively covered the frontline with numerous military camps and permanent buildings, with thousands of new and veteran soldiers arriving every day.