Final answer:
Japan's attack on Pearl Harbor resulted in the US declaring war on Japan and significant loss of life among Americans.
Step-by-step explanation:
A result of Japan's attack on Pearl Harbor was that thousands of Americans died and the US declared war on Japan. The attack on Pearl Harbor, which occurred on December 7, 1941, marked the entry of the United States into World War II. It led to a significant loss of life and damage to the US Pacific Fleet.
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