The United States also had an obvious interest in these natural resources, and in response to to the Japanese aggression, the U.S. Congress placed restrictions on doing business with Japan. And, if that weren’t enough, Japanese assets in the United States were frozen.
President Roosevelt moved the US Pacific Fleet from California to Pearl Harbor in 1939. This move was a threat to Japan, who wanted to expand in the Pacific. Military leaders and politicians saw a war between the U.S. and Japan as inevitable, with the solution being to attack first. Japan did just that.
