I am somewhat of a WWII history buff, and this movie does not convey the absolute mayhem of evacuating 300,000 men using about 700 ships and small boats, under heavy German fire, with 18 squadrons of British flyers and god only knows how many German planes. It just doesn't. If you've seen the D-day footage, this should have been like D-Day in reverse. Total war, total confusion, total panic.