But you're right. The Great War of 1914-18 was the real thing all right. My German, French, Italian and other European friends here in Spain say the same. The end of the Old Order, entirely brought about by European elites squabbling amongst themselves, with entire peoples paying the price. All the young men of entire villages and towns gone. Cold wind blowing over empty fields.
Then part 2, 1939-45 following that bad French Treaty (Versailles) and the economic crash and depression caused by those same greedy selfish elites.
My father (British 8th Army despatch rider, Norton 500s, in North Africa, Middle East, Anatolia, Italy) told me, I paraphrase, "We came home from that war we'd won, with that recent experience, being demobilised but still with acces to arms. We said to our elites, this was your fault, again. We really do not want to have to do this ever again. Never again. So we're going to make a deal. We want socialism, this much socialism (education, health, heavy industries...). You will pay taxes, this much in taxes. We remain a capitalist, but mixed, economy. Either you accept this deal or we are going to go full Communist." The deal was, grudgingly no doubt, accepted. It was decided the Empire made no sense, the opposite in fact, and had to go...
We have not been aggressive warmongers since then. But we are certainly ready to defend ourselves and our friends. We sincerely hope our friends will not make that necessary, again.