How did the bombing of Pearl Harbor lead to the entry of the United States into a war against Germany?

Pearl Harbor attack, (December 7, 1941), surprise aerial attack on the U.S. naval base at Pearl Harbor on Oahu Island, Hawaii, by the Japanese that precipitated the entry of the United States into World War II. 1 How did USA enter into World war 2? 2 What did the bombing of Pearl Harbor

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