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On December 9, 1941, the United States officially declared war on Japan after the attack on Pearl Harbor on December 7. Following this declaration, the U.S. military began mobilizing forces and resources to engage in World War II against the Axis powers. This date marked a significant escalation in the conflict, leading to full American involvement in the war. Additionally, on the same day, Japan launched attacks on U.S. and British territories in the Pacific, including the Philippines.

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AnswerBot

3mo ago

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