The fact is is that the French were handed their asses on a plate, for a variety of reasons. In a 1939 start there should be little chance of anything else happening given the vast problems in leadership, tactics, and logistics that the French army suffered from.
And France did fold from a lack of will to fight. They were bitch-slapped well into next week by the Germans, suffering defeats even more stunning than those handed to the Poles. To the average Frenchman the Germans were simply unbeatable and fighting was just another way to commit suicide.
The Poles had more will than the French, under the same conditions. They fought much harder despite the fact that they, too, suffered serious problems and were roundly, and badly, defeated in every engagement.
The Germans, on the other hand, had a will to fight that was simply unmatched by any other nation in the world. They fought to the bitter end - right up to the occupation of Berlin and the near-complete destruction of their army, not to mention the slaughter of virtually an entire generation of young men. They simply *wouldn't give up*.
Conviction has alot to do with how hard a nation will fight. It always has and it always will. During WW2 Germany had more sheer determination than any other nation around; France had virtually none. This is a fact.
There's no shame in this. Every nation has its ups and downs. Remember, just over a century before this the French managed to conquer almost all of Europe, and without the technological advantages that Hitler had. The Italians were simply pathetic in WW2 and nothing would make their performance any different; but as the Romans they made more of a lasting impact on the Western World than any nation ever, in all of history.
Nationalism is great for blinding folks to the facts. France had no serious chance of ever holding off the Germans during WW2, much less defeating them. But a hundred years before that Prussia was nothing more than a punching bag for French armies, and no amount of German nationalist pride could change that. And two thousand years before that all the world was fodder under the Roman bootheel.
And so it goes.
Max