During the beginning of the war, Japan was invading many of its surrounding countries for resources. A few of theses countries consist of Manchuria, Korea, some of China, New Guinea, and many others.
Admiral Isoroku Yamamoto
Points of Invasion Japan
After America found out about Japan invading other countries and taking them over, America cut off their supply and trade of steel and oil, leaving them with even fewer resources.
FDR/"Date which will live in infamy"
On December 7th, 1941, Japan attacked America, with supposedly no warning. They decided that by decimating America's naval fleet, they could continue with their invasions of other countries. 2403 lives were lost.
The effect the attack had on Japanese-Americans.
Yamamoto's career as a naval admiral began in 1904 when he graduated from Japan's Naval Academy. In 1926 he returned to the U.S. for a second time (the first was to attend Harvard) as the Japanese attache in Washington.
"Yesterday, December 7, 1941—a date which will live in infamy—the United States of America was suddenly and deliberately attacked by naval and air forces of the Empire of Japan."
The attack on Pearl Harbor caused a lot of trust issues with any Japanese-Americans. It had made all Japanese suspects and they were terrified of going outside for fear of discrimination. Japanese-Americans were later put into internment camps.