December 7th is known as the "date which will live in infamy" because of which historical event?

Answer Pearl Harbor

President Franklin D. Roosevelt was just finishing his lunch in the oval office on the afternoon of December 7, 1941, when he received an urgent call from the Secretary of the Navy. Japan had carried out a surprise attack on the U.S. military bases at Pearl Harbor on the island of Oahu. 2,403 Americans were killed. Roosevelt and advisors spent the rest of the afternoon working on his speech, fine-tuning the words he would use to address the nation in the wake of such an unprecedented affront. At 12:30 pm the next day, he delivered one of the most famous presidential speeches in history — and, at seven minutes, one of the shortest. Less than an hour later, Congress officially declared war on Japan and brought the U.S. into World War II.

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