The US had put an oil embargo on Japan for invading other nations especially China. They also intended to Invade the Dutch East Indies to get their oil. President Roosevelt was negotiating with the Japanese about lifting the oil embargo. They attacked prematurely without word from the Japanese delegates in Washington, DC. Japan in essence declared war on the United States.
Japan bombed Pearl Harbor. That incited the USA to declare war on Japan and Germany.
Pearl Harbor.
To declare immediate war on Japan.
CANADA
The US was forced to declare war on Japan in DECEMBER 9, 1941
google pearl harbor dumbf***
No we declared war on japan then Hitler declared war on us all after pearl harbor
after japan attacked pearl harbor and declared war on japan a German Allie
japan and Germany were allies (axis powers)
Pearl Harbor was the main reason the US joined the war. They declared war on Germany and Japan because Japan bombed Pearl Harbor, and Germany was Japan's ally.
Germany had a pact with Japan and Italy.
Japan. Then Germany declared war on the US.