Well, most people correlate the French Resistance with De Gaulle, who was an ally of US and the UK, and therefore Day-D as the key battle makes action in the lay (non-french) people understanding of the liberation of France.
Outside of that, I think that USA role in WWII is underrated by some people ("tankies" beig only a part of them). WWII was not the Allies vs the nazis, it was the Allies vs the Axis. The USA was the main actor in the defeat of Japan and its role on the defeat of Italy (even if it was the weak link of the Axis) is appreciable. The role of the brittish in the war agaisnt Germany, specially in 1940, should neither be underrated.
Even if you consider only the battles fought by the western allies, you don't need to consider the Normandy landing the top battle.
Which one would be for you?
