Answer:
(See explanation for further details).
Step-by-step explanation:
The resistance movement and the triumph of the Allies on Normandy allowed the establishment of a operations center for the US Army in Continental Europe, to be precise, in France, and made possible a second front that enclosed the Third Reich. The resistance movement was useful to Allies because of their skills on intelligence, counterintelligence, espionage and sabotage against German army.