It depicts the harrowing May 1940 evacuation of the British Expeditionary Force, which had been trapped by the rampant Nazi military at the French port of Dunkerque.Thar 4dIn their hour of desperate need, more than 300,000 British soldiers were rescued with the aid of a motley civilian flotilla of fishing trawlers, family yachts, barges, tugboats and merchant vessels, which ferried them from the beaches and onto the safety of Ol’…