Research Topic

My research topic was the French Resistance, but then I tweaked it a little bit. I changed it to Resistance in World War 2. I am focusing mostly on the French Resistance, and some on the Polish Resistance. My new question is, "How were resistance movements in occupied zones effective against the Germans in World War 2?" This is an important topic because resistance movements affected the Germans and the outcome of the war. Without resistance, the end of World War 2 might have been different.
The French Resistance was just a secret group of men and women who fought against the Nazi-Germans in World War 2. They started after the fall of France in 1940. The Resistance took shelter in the south of France when the north was occupied. The Resistance sabotaged German supply lines, aided the Allied Forces, provided intelligence, and even helped by participating in the ground fighting. The Polish Resistance is very similar to the French because they also provided intelligence, sabotaged German efforts and they fought on the ground, but a big difference is that the Polish tried to help the Jews a lot more than the French did.