Not directly answering your question, but there's a significant debate as to how effective or widespread the French resistance actually was. Douglas Porch might be considered the key author for this anti-revisionist stance: http://www.amazon.com/The-French-Secret-Services-Intelligence/dp/0374529450

In this telling, the post-war French resistance lionization was largely an attempt to whitewash the fact that many (most?) French collaborated with the Nazis or at least tacitly accepted their rule. It was only once the Allied landings were imminent that you actually got widespread resistance and at that point it hardly mattered.

Further glossed over is that much of the resistance was organized by Communists and Socialists that were ideologically opposed to the Nazis, not by ordinary French citizens.

No matter what you believe about the French resistance, France and Belgium tied up significantly less rear-area units than the Balkans, Poland, or Russia did given the size and population of France and Belgium.

According to Wikipedia (http://en.wikipedia.org/wiki/German_occupation_of_Belgium_during_World_War_I), the Belgians were generally very unhappy with the German occupation during WWI, but most resistance was passive. So perhaps there are some parallels with Nazi occupation of Western Europe.

There was resistance to the German occupiers, but vast underground networks were not in play, to my knowledge, unlike in the Second World War. There was no widespread civilian resistance against the German occupiers. The Germans, however, believed that there was, and in 1914 committed a number of atrocities against Belgian and French civilians, like the shooting of hostages and the burning of towns, most famously the university city of Louvain.

There was defiance of course, which took the form of clandestine newspapers and passive resistance, as well as the odd pot-shot against German soldiers (which the Germans inflated to massive proportions - the myth of the franc-tireur, or civilian sniper, which terrified German soldiers and led to many of the aforementioned atrocities.

Many Belgian men sneaked into the Netherlands, and from there they could rejoin the Belgian Army. Perhaps about 50,000 draft-age Belgians did so. In response the German governance of Belgium was very strict. The use of telephones and telegraphs was prohibited and international communication was censored. Barbed wire was erected on the Dutch border, and universities closed, save the University of Ghent which was forced to operate in German. As things got more dire for the Germans more and more Belgians were conscripted as labor for the German war-machine.