You got one fact wrong so, it was Austria-Hungary that did start the war. It was them who did everything to create a casus belli in Serbia, despite Serbia agree

You got one fact wrong so, it was Austria-Hungary that did start the war. It was them who did everything to create a casus belli in Serbia, despite Serbia agreeing to basically all of Austria-Hungary's demands. If you need an evil party to point your finger at. Not sure what to make of the rest of you post so, if already ignore everything about the beginning of WW1, and still come to simple, clear cut conclusions on guilt based on the Versaille treaty, written by the victors and signed by the loosers, of which only Germany was still left, whom surrendered unconditionally. Edit: The Marginot line was built after WW1 to prepare for the ultimate round two of WW2. You seem to confuse those two conflicts to a certain degree.