World War II
World War II. 1939-45. Allies-Britain, France, US(1941-), Russia(1941-) vs Axis-Italy, Germany, Japan, Russia(-1941). Caused by German Totalitarian expansionism resulting from WWI reparations and fear of Communism. 55M dead. 35M wounded. 30M refugees. Cost $US 1500B. Led to United Nations, Soviet power, State of Israel, atomic weapons.