On a map the Azores appear as nine tiny specks in the middle of the Atlantic Ocean, but their location was to prove strategically vital in two world wars. The Atlantic became a crucial battleground twice within the space of 25 years, as the US 'arsenal of democracy' sent firstly stores, arms, and equipment, followed by many thousands of troops to fight in Europe. In both desperate and closely fought struggles at sea, Germany sought to stem the flow and thereby win the war by cutting this v...