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08/12/1941 The United States declares war on Japan, entering World War II

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America Declares War on Japan - President Roosevelt Speech

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Treacherous Japs Open War On U.S. Aka Japan Declares War On Us (1941)

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United States declares war on Japan, December 8, 1941 HD Stock Footage

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America Enters World War II - Decades TV Network

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U.S. Mobilization for World War II

The United States Congress declared war on the Empire of Japan in response to that country's surprise attack on Pearl Harbor the prior day. It was formulated an hour after the Infamy Speech of US President Franklin D. Roosevelt. Following the U.S. declaration, Japan's allies declared war on the United States.
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    • United States declaration of war on Japan