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The actions that the United States take immediately after the attack on Pearl Harbor is that Congress declared war on Japan the next day.
What action did the US do after attack on Pearl Harbor?
When the Japanese were said to have attack Pearl Harbor, this act shows that Japan has formally declared war against the United States.
Due to the above, President Franklin D. Roosevelt signed Executive Order that was said to authorize relocation he also addressed Congress, by asking them to declare war on Japan.
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