Timeline of the Battle of the Atlantic

This is a timeline for the Battle of the Atlantic (1939–1945) in World War II. == 1939 == === August === August 19, 1939 Five U-boats sail from Kiel and nine from Wilhelmshaven to take waiting positions in the North Atlantic. August 21, 1939 German "pocket battleship" Admiral Graf Spee sails from Wilhelmshaven for a South Atlantic cruise.

Source: Wikipedia — Timeline of the Battle of the Atlantic (CC BY-SA 4.0)