Prior to the US Embargo was the Invasion of "Manchuria" and China. Heck Japan had been ruling Korea since 1910. > In 1937 Japan invaded Manchuria and China pro

Prior to the US Embargo was the Invasion of "Manchuria" and China. Heck Japan had been ruling Korea since 1910. > In 1937 Japan invaded Manchuria and China proper. Under the guise of the Greater East Asia Co-Prosperity Sphere, with slogans as "Asia for the Asians!" Japan sought to remove the Western powers' influence in China and replace it with Japanese domination.[24][25] The ongoing conflict in China led to a deepening conflict with the U.S., where public opinion was alarmed by events such as the Nanking Massacre and growing Japanese power. Lengthy talks were held between the U.S. and Japan. When Japan moved into the southern part of French Indochina, President Roosevelt chose to freeze all Japanese assets in the U.S. The intended consequence of this was the halt of oil shipments from the U.S. to Japan, which had supplied 80 percent of Japanese oil imports.