There were resistance fighters in all of the European countries. True, the French get the most press and that could well be a P.R. thing. But my Uncle, who was in Europe from D-Day until after the German surrender says (said) that they were real.
One of my high school buddy's dad was in the 82nd airborne, and took part in Operation Market Garden, jumping behind German Lines in The Netherlands.
He got caught in a tree and broke his leg and a few ribs. He was hanging by his parachute when he heard German sounding voices in the woods. Knowing it was Germans, and having lost his weapon, he prepared to die.
It turned out to be Dutch Resistance Fighters. They rescued him and got him back to England somehow.
He died in the early 80s, but his story was quite moving to hear him tell.
That also lead to him meeting my friend's mother, an army nurse.
