In 1939, tensions rase and the U.S. dissolved treaties with Japan
In 1940, the U.S. cut off trade of oil, steel, rubber and other vital goods
The U.S. hoped that economic pressure would shut down the Japanese war dynamic, but the opposite happened
Japan took the U.S. behavior as a declaration of war. It thought an American intervention was inevitable, and planned a coordinated offensive to neutralize any foreign influence in the Pacific
