The Axis, with its U-boats, responds with a counter-blockade that is at first successful, but the Allies' use of convoys, aircraft and technology eventually turns the tide.
World War II's longest continuous campaign takes place, with the Allies striking a naval blockade against Germany and igniting a struggle for control of Atlantic Ocean sea routes. The Axis, with its U-boats, responds with a counter-blockade that is at first successful, but the Allies' use of convoys, aircraft and technology eventually turns the tide. Over five years, thousands of ships engage in 100-plus battles in the Atlantic Ocean with approximately 100,000 lives lost.