So we all know of the infamous promise whereas Kaiser Wilhelm II told the German soldiers marching to the Great War that "they will return home by Christmas" and stuff like that (although in some accounts I've heard that he said "home before the leaves have fallen off the trees"), which is now commonly used as a way to show how detached the leadership of the nations in WW1 were from reality.
So then is it possible to make Wilhelm's promise come true? Is there a way to have World War I end before December 25th, 1914? It doesn't matter which side wins, just one requirement - it still has to count as a world war, with at least a majority of the great powers in Europe participating, so it can't just be a regional conflict between Austria-Hungary and Serbia.
I'd love to hear your suggestions.