Which war in the mod is the most annihilating?

Of all the wars in the mod, which war is the bloodiest and most destructive to both (or more) sides of the conflict in terms of manpower, structures and buildings, perhaps even natural resources?

I also distinguish several variations of the same war (for example, the Second European War with Navalny at the head can take place in a completely different way with Dugin at the helm).