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The United States declared war on Japan due to the attack on Pearl Harbor on December 7, 1941. America was mad because it is not right to attack a nation that you are not at war with. And the next day FDR went to congress and gave his famous infamy speech after which he asked congress if they would declare war on japan all votes except one were for war the women who voted against it was a pacifist.

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14y ago

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