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December 7th, 1941 was the date that Japan attacked Pearl Harbor.

The US declared war immediately.

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After the US declared war on Japan what other two countries declared war on the US?

After Japan attcked Pearl Harbor we declared war of Japan, and Germany.


What happened to the US after it declared war on Japan?

Germany declared war on the US, the US then declared war on Germany.


Why did the US claim war on Germany?

it was part of the alliance thing germany was in alliance with japan and japan attacked usa in pearl harbour and declared war on japn therefore on germany as well answer 2: During World War 2, after Japan attacked the US, the US declared war on Japan. Germany in response declared war on the US, the only such declaration made by Nazi Germany. In response to the German declaration, the US declared war on Germany.


What provoked the US to declare war on Germany?

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.


Why didn't japan join Britain USA and Australia?

Japan had early alliances with Germany. They were promised the Pacific Island holdings of the US if the Axis powers won the war.


Why did the US join the war against the Nazi's?

There really wasn't much choice. After Pearl Harbor was bombed the US declared war on Japan and as a result Germany, who was an ally of Japan, declared war on US. We would have gotten involved anyway because the goal of Germany was world domination. The plan was beat England and then invade the US.


Why did Germany and Italy declared war in the us?

After Japan bombed Pearl Harbor we declared war on them. Germany was an ally of Japan so they declared war on us. Italy was an ally of Germany so they went along with Germany and declared war.


What country did Germany try to make declare war on the US?

No country. After Japan bombed Pearl Harbor the US declared war on Japan. Within days Germany declared war on the US because they had an agreement with Japan.


When did us win war against japan and Germany World War 2?

The war between Germany and Japan ended in the year 1945.


Why did America go to war with the Germans during World War 2?

The US went to war with Germany because Germany declared war on the US, on December 11, 1941. This was four days after Germany's ally Japan attacked the US fleet in Pearl Harbor, and three days after the US declared war on Japan. Germany was not obligated to declare war against the US under the terms of its treaty of alliance with Japan. Germany would have been obligated only if Japan were attacked, and not if Japan was itself the aggressor. Nevertheless Germany decided to open hostilities.


What did Germany do that made the us join World War 2?

Germany didn't do anything to directly bring the US into the war. The US joined World War II because Japan attacked the American naval base at Pearl Harbor, Hawaii on December 7, 1941. However, Germany and the US were not friends at the time- Germany was very belligerent and had been conquering other countries, which the US opposed. World War II started in September 1939, and the US was quietly supplying Germany's foes (mainly the United Kingdom) with weapons during the period between 1939 and the Pearl Harbor attack. Germany was allied with Japan since 1940, so when the US was attacked and declared war on Japan, Germany immediately declared war on the US.


Did Japan attack the US after the US declared war against Japan's ally Germany?

No. Japan attacked the US on December 7, 1941; Japan declared war that same day.On December 8th, the US Congress declared war on Japan after FDR's memorable "Day of Infamy" speech.On December 11th, Germany and Italy declared war on the US, since they were allies of Japan. Later that same day, the US Congress declared war back on Germany and Italy.