Political map of North America & the Caribbean 14 August 1945 (Victory in World War II): In 1944, the Western Allies liberated France (Normandy landings) and, together with the Soviet Union, conquered Germany (Battle of Berlin) the following year. That August, the US used the newly invented atomic bomb (Atomic bombings of Hiroshima and Nagasaki) to help force the Japanese surrender and bring the Second World War to an abrupt end.