In a war there are many factors one must take into account such as which nation supports the other or what historical ties they have with the people within the opposing nations'borders. But since this question specifically states France vs Germany, I will assume that France and Germany are the only participants. If these 2 nations were to go head to head, I would put my money on Germany. Their intelligence and creativity has won them many battles throughout history and has inspired the advancements of armies of the current superpowers. 2 world wars have come and gone, and in each the raw power and sheer strength of the German Wehrmacht has overpowered the French military to the point of total collapse. Jon Stewart calls Germany "the Micheal Jordan of war". The German economy is by far the largest in Europe giving them much influence over things such as propaganda, exclusive military progress without foreign aid. There is no stopping the German Blitzkrieg if it started rolling.