One thing I should toss out there, is that a war of some size and magnitude had been building since at least 1870-71 Franco-Prussian war. Tension between Germany and France had existed since the time of Napoleon. Germany was militaristic and France felt the need to match Germany when it came to the military. This wasn't limited to land based armies either. Great Britain and Germany were in a race to build newer, bigger and more powerful warships. And if that wasn't enough countries were trying to either maintain or add to their list of colonies. A war was going to take place. It was just a question of when and how big.