With a pod after 1900, have the most destructive possible war take place in western europe. Now, this seems like a dumb question, because plenty of those have happened otl right?
But nothing in western europe has ever matched the carnage that was the Eastern Front of ww2. Would be it be possible to have a post 1900 war in western europe with levels of brutality and carnage seen in the ww2 eastern front?
Maybe an integralist France vs fascist (not nessecarily Nazi) Germany?
What effects would this have in the region, Europe and the world? How would it affect the colonies? How much would it affect the involved countries' positions on the world stage?