Can somebody explain the purpose of the "Great War" units? It seems to me they're only purpose is to draw out the industrial/modern era which seems like a unnecessary and personally motivated decision by the developers (ie. "I like the modern era so I'm going to put more of it into G&K"). From a historical standpoint the decision seems almost asinine; the differences between the great war versions of infantry, fighters, bombers, and machine guns are all qualitative, especially the infantry, which were essentially the same between WWI and WWII, the most significant difference being tactics. And the landship is just a joke.