Who will remember these mundane things if we do not?
The scale of war changed dramatically for Europeans with the Great War. This meant not just soldiers but large crews of engineering units. The past did have engineers that devised siege weapons or maintain Greek Fire, but the Great War boosted the scale. Who would rebuild bombed out bridges? Who would clear the destroyed trees? Who would refurbish enemy guns destroyed or simply move them back to melt down for reuse of the metal? I enjoy the nickname for America's version of engineering battalions, the Seabees. They will never disappear. Industrialized war will need massive units of engineers.