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Japan bombing Pearl Harbor on December 7, 1941.
The Japanese attack on Pearl Harbor, December 7,1941 was the immediate cause of the United States entering WWII. The US declared war on Japan after the attack, and two days later Germany declared war on the US and we were in it.

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Immediate cause for US entry into war world 2?

The attack on Pearl Harbor


What were the causes results of American entry into World War 1?

One of the cause of America entry into World War One was the announcement by Germany that there was unrestricted submarine warfare. The effect of America's entry is that it sped the end of the war.


What was the immediate cause of British entry into First World War?

The immediate cause of British entry into the First World War was Germany's invasion of Belgium on August 4, 1914. Britain had a longstanding treaty obligation to protect Belgian neutrality, which was violated by the German military campaign. Consequently, the British government issued an ultimatum to Germany to withdraw its troops from Belgium, and when Germany failed to comply, Britain declared war on Germany. This decision was also influenced by concerns over maintaining the balance of power in Europe.


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Which of these was a cause of Americas entry into world war 1?

the Zimmermann note


How did American entry into world 1 affect Germany strategy?

Not Sure


Which was a basic cause of US entry into World War 1?

Economic gain.


Which was a major cause for the entry of the U.S. into World War 1?

A major cause for the U.S. entry into World War I was the unrestricted submarine warfare employed by Germany, which threatened American shipping and lives. The sinking of the Lusitania in 1915, which resulted in the deaths of American passengers, heightened public outrage. Additionally, the interception of the Zimmermann Telegram, in which Germany encouraged Mexico to join the war against the U.S., further galvanized American support for intervention. These factors combined to shift public opinion and political will towards joining the Allies in the conflict.


What was the immediate cause of US entry into Wolrd War1?

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What event triggered the American entry into World War 1?

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One of the primary causes for US entry into world war 1 was the use of?

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How did American entry into World War I affect Germany's strategy?

They believed they needed to crush the Allies before American troops arrived.