After WW1 the whole world was in financial ruin, many powerful leaders stood up called dictators and started to spread propaganda about a WW2!
Adolf Hitler was the dictator of Germany and he hated Jews he put millions of Jews in concentration camps. His plan was to wipe the Jews off of earth and rule the earth.
Benito Mussolini was the dictator of Italy and created the Fascist party. He overextended his forces and was killed by his own people.
Francisco Franco was a brutal dictator and took over Spain with help from Mussolini.
Joseph Stalin was the dictator of the Soviet Union, a communist country.
Hideki Tojo was named prime minister. To get resources for its industries and he decided to conquer nations in Asia and in the pacific.
During all this America decided to stay neutral.
After all these years of war the war has just started and has already caused so must destruction all over the world.