The 'miracle' of Dunkirk is one of the most inspiring stories of all time. The British Expeditionary Force had been all but surrounded, and, with the French armies collapsing on all sides, it appeared that Britain was about to suffer the heaviest defeat in its history.

JOHN GREHAN has written, edited or contributed to more than 300 books and magazine articles covering a wide span of military history from the Iron Age to the recent conflict in Afghanistan. John has also appeared on local and national radio and television to advise on military history topics. He was employed as the Assistant Editor of Britain at War Magazine from its inception until 2014. John now devotes his time to writing and editing books.