December 8th, 1941.
Officially the Japanese attack on Pearl Harbor, December 7th, 1941
US was rich and they didnt want to risk entering the war because that would put their wealth into jeapordy. In December 1941, they joined because Japan attacked Pearl Harbour,Hawaii. This affected US because US kept all their ships in Pearl Harbour.The US joined because they wanted revenge.
The two main factors that caused the US to enter World War II were the Japanese attack on Pearl Harbor on December 7, 1941, and Germany's declaration of war on the US on December 11, 1941. These events directly threatened American national security and forced the United States to take an active role in the war.
Pearl Harbor attack happened on the 7 December, 1941. So, the President of the USA was Franklin Delano Roosevelt.
11th December 1941, shortly after German's declaration
I don't think that the US declared war on Germany. Germany declared war on the US on December 11th 1941
Japan attacked the US Naval Base at Pearl Harbour on December 7th 1941 and on December 11th, Germany declared war on the US.
Germany declared war on the US on December 11th.AnswerThey didn't. Germany and Italy declared war on America, after the Japanese bombed Pearl Harbour.AnswerDecember 8th, 1941
December of 1941
In December 1941 the Japanese bombed Pearl Habour, which triggered the US joining WWII.
December 8th 1941
On 7 December 1941, Japanese forces attacked the US base at Pearl Harbour in Hawaii. On 8 December 1941, the US declared war on Japan. On 11 December 1941, Germany declared war on the US.
Hitler declared war on the USA on 11 December 1941, during a Reichstag speech in Berlin.
They didn't. Japan attacked Pearl Harbour on 7 December 1941 and Germany declared war on the US 4 days later on the 11th.
The United States entered World War II after the Japanese attack on Pearl Harbour on 7th December 1941. The US declared war on the following day, 8th December 1941.
On December 7, 1941 Japanese naval forces attacked the American port of Pearl Harbor killing 2,403 Americans. The following day the US declared war on Japan and on December 11th Germany declared war on the US effectively removing the US from its neutral status.