It was a social and economic system.
Demeter, the Goddess of the Harvest. What happened was that Demeter wanted to get her daughter back from Hades, so she took a "resignation" from her duties as the harvest goddess and all plants were decaying on Earth, and droughts started.
Although the war began with Nazi Germany's attack on Poland in September 1939, the United States did not enter the war until after the Japanese bombed the American fleet in Pearl Harbor, Hawaii, on December 7, 1941<span>.</span>