Czechoslovakia, Poland, The Kingdom of Yugoslavia(under a slightly different name), Albania, Turkey, Saudi Arabia, Estonia, Latvia, Lithuania, Finland, and several short lived countries, like Ukraine. Austria-Hungary split into Austria and Hungary, as well as many of the aforementioned nations.
One of the interesting things about this period just after the war was the lack of peace that ensued. The Polish forces fighting with the French took all of the equipment and training they got in France and went to fight for parts of Galicia that the new Poland wanted from the semi-recognized and doom...