France was not established by its revolution. The greatest part of the political integration of the modern nation had already been achieved before 1789.
What might be interesting to think about is the June, 1940 position of France and the arrival of the Wehrmacht. Of course, The situation should not have been as it was; France should have driven deep into Germany at the beginning of Sept., '39. But, given that they waited and Guderion came through the Ardennes, what could the French Army have done?
Well, Paris is indefensible strategically. We assume that the French had not made the mistake of betting everything on the bad British strategy and the the army itself had not been flanked. Withdrawing into the massif central and moving the fleet from the Med around to the Atlantic, they could have given the Germans hell for a long time, and maybe have better negotiated an armistice. They had good fighter planes and good tanks. These were just poorly used.