Thousands of miles of emptiness. Nothing but blue, grey, green and white. Giant waves, shrieking gales, water so cold. This is what millions of people in history had to cross in order to begin new lives. Witnessing the greatest migration of peoples in history as well as the longest and most bitterly fought of all naval battles it connects two hitherto unknown continents. There is perhaps no stretch of water quite as forbidding, no stretch so important to human history as this one. This is the story of the North Atlantic.