Before the end of World War II, modern military thoughts were sea power theory, air superiority theory and mechanized warfare theory. Mahan (USA) put forward the theory of sea power, Charles de Gaulle (France) put forward the theory of mechanized warfare, and Giulio Du Hei (Italy) put forward the theory of air superiority. The Second World War (from September 1, 1939 to September 2, 1945), also known as the World Anti-Fascist War, was the second global-scale war between Germany, Italy and Japan, the three fascist axis countries and their servant countries, the anti-fascist alliance and the anti-fascist forces all over the world.