Common belief and actual events can be miles apart. The 1940 campaign in the west was short - approx. 6 weeks but it consisted of some rather sharp fighting. The French lost over 100,000 killed. I don't remember the German numbers off the top of my head, sorry, but it was far from a cake walk for them.
Fair enough. I also remember reading that the 5th division threw down their rifles, stripped off their uniforms, and ran.
The invasion of France is a shame to Germany, and France.