Cockleshell Heroes is a solitaire play game portraying Operation Frankton. Operation Frankton was a commando raid on ships based in the German occupied French port of Bordeaux during the Second World War. The raid was carried out by a small unit of the Royal Marines know as the “Royal Marines Boom Patrol Detachment”, who were part of a combined operations transported by the submarine, HMS Tuna. Variant rules for two players are included. —description from the publisher