The US cuts off supplies of oil and scrap metal to Japan and begins secretly attacking their submarines in Pacific waters.

Roosevelt and his advisors allegedly seek an excuse to enter the European war.

The Japanese hold on imperial conference on December 1 to discuss their option and decide to implemant plans for a crushing aerial attack against the US Pacific Fleet stationed at Pearl Harbor in the Hawaiian Islands.

On December 2, the Japanese task force receives a coded order to begin the air attack.