In 1941 the month of December, and the day the 7th. The Japanese Empire attacked Pearl Harbor through a surprise navy attack. There are many factors leading up to Pearl Harbor. The U.S. and Japan had already had disagreements. What made it go over more and more was Japan fooling with China. At first they wanted to expand, and then Japan declared war on China. That made the U.S. respond with trade embargoes and sanctions dealing with economics. Japan then attacked the U.S., and is known today as "The Attack On Pearl Harbor."
Japan and the U.S. had been butting heads for awhile before the attack on Pearl Harbor.
For better Japan wanted to expand to China to solve some demographical and economical problems
China I would love if you would just consider expanding.
Japan is now declaring war on you China.
In response to Japan's behavior we are responding with trade embargoes and economic sanctions.
The Japanese Empire surprise attacked the U.S. through the navy on December 7, 2018.
"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......."