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Japan bombed the US Naval Fleet in Pearl Harbor, Hawaii on December 7th, 1941. This caused the US to declare war on Japan the next day. This officially put the US into World War 2. The day after that, the United States declared war on Germany.

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Q: What was the immediate cause of the official US entry into World War 2?
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Immediate cause for US entry into war world 2?

The attack on Pearl Harbor


What was the immediate reason for the entry of the US into World War 2?

The Japanese attacked Pearl Harbor December 7, 1941.


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

the Zimmermann note


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

The immediate cause of American entry into World War 1 was the German submarine warfare that targeted American ships. In addition, the interception and publication of the infamous Zimmermann Telegram, in which Germany proposed a military alliance with Mexico against the United States, further pushed the U.S. to join the war. American entry ultimately tipped the balance in favor of the Allies and led to their victory. Additionally, it accelerated social and political changes in the United States, as well as increased American influence on the world stage.


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

Economic gain.


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

Japanese attack at Pearl Harbour. That's World War 2. The United States entered World War I after the Zimmermann note, which offered German aid for a Mexican invasion of the US, was intercepted, translated and sent to Woodrow Wilson by the British.


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Which development made U.S entry into World War 1 vital to the allied cause?

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What two events upset the US but did not cause entry into World War 1?

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What made US entry into World War 1 vital to the Allied cause?

Fresh manpower was needed to break the stalemate.


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