Truly a stupid war. But it makes you think. If the First World War hadn't been to brutal and demonstrated in just about the most extreme way how outdated the conventional wisdom of the past was would the Second World War have been as... improved an affair? For instance Rommel perfected his method of Fire and Maneuver Tactics in the latter part of WW1. He published a book on it in the 30s. How different could it have been?
But then again that's silly since WW2 was just the eventual completion of what was halted in 1918. "Not a treaty but an Armistice for 20 years". A cookie to who can name who said that. And how right he was.