World War, 1939-1945 World War, 1939-1945. World War,1939-1945 World War 1939-1945 World War Ⅱ:1939-1945 Second World War, 1939-1945 World War, 1939-1945-Germany. World War,1939-1945+Greece World War,1939-1945-Japan. World War, 1939-1945 -- Causes