During 1940 the German army swept with devastating speed across the Low Countries and into northern France and drove Allied forces back into a small pocket around Dunkirk. Without a swift withdrawal across the English Channel, the latter faced certain death or capture. The evacuation plan - Operation Dynamo - initially calculated that 45,000 men might be rescued, but between 26 May and 4 June 338,226 men were in fact brought back to England. Naval historian Philip Weir shows how this was made possible by a vast armada of disparate vessels including destroyers, minesweepers, fishing vessels and, most famously of all, the privately owned -Little Ships-. He explores the vessels- various roles within the evacuation, and their subsequent fates, including preservation and participation in commemorative return runs to the port, which now take place every five years.