As well as the end of the Hapsburg Austro-Hungarian Empire.
Yes, and don't forget who was a decisive figure in this destruction: U.S. President Woodrow Wilson. We rightly complain that he was the first progressive "dictocrat" president here at home, but his foreign meddling after the war helped set the stage for WW II. He did this largely by pursuing the calamitous policy of destroying the Austro-Hungarian monarchy. Although he did this in cahoots with the French, he was still one of the major drivers of this insane policy. In breaking up A-H, he created the little states that Hitler was able to occupy one by one in the run-up to WW II.