How did the events on december 7, 1941 change the course of world war 2

The attack on Pearl Harbor was a surprise military offensive by the Imperial Japanese Navy against the United States naval base at Pearl Harbor (Hawaii) on the morning of Sunday, December 7, 1941. The attack was intended as a preventive action aimed at to avoid the intervention of the United States Pacific Fleet in the military actions that the Empire of Japan was planning to carry out in Southeast Asia against the overseas possessions of the United Kingdom, France, the Netherlands and the United States.

The attack deeply shocked the American people and led directly to the entry of the United States in World War II, both in the theaters of war in Europe and the Pacific. The day after this offensive, December 8, the United States declared war on the Empire of Japan. The internal support in North America for non-intervention in the world conflict, which had been strong, disappeared, while the clandestine assistance to the United Kingdom was replaced by a full alliance. Nazi Germany and Fascist Italy declared war on the United States on December 11, in response to operations launched against the Asian power of the Axis.

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