While it would be mostly a Political Story, the "battle" off Mers El Kabir would be my very first choice to make into a movie.
The overarching story over what to do about the French Fleet, with de Gaulle and Churchill trying to come to agreement, the fear of the fleet falling into the hands of the Germans. The French Officers and Men forced to consider where their loyaty may lie between the Resistance, the Vichy, and their own lives. The final Battle where Owen Wilson and the USS Arizona arrive just in time to Sink the French Fleet, as well as a Nazi submarine that was secreting away a nuclear weapon to use on New York.
Really, that story has it all.
-Sik