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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.

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βˆ™ 2015-08-18 13:45:49
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βˆ™ 2009-03-30 18:55:06

December 8, 1941 is when the U.S.A. went into the war. Japan declared war on the U.S.A. on December 7, 1941.

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βˆ™ 2010-12-02 14:37:02

The us entered ww2 in 1941

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Q: What year did the us enter the world war 2?
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