15. The Shock of Pearl Harbor
The Japanese attack on Pearl Harbor on December 7, 1941, was a pivotal moment that propelled the United States into World War II. The surprise assault resulted in significant loss of life and material damage, galvanizing public opinion and unifying the nation in support of military action. The following day, President Franklin D. Roosevelt addressed Congress, declaring December 7th “a date which will live in infamy,” and called for a declaration of war against Japan. This event marked the end of American isolationism and signified a commitment to defeating the Axis powers (nationalgeographic.com).



