Pearl Harbor is a U.S. naval base in Hawaii that became famous as the site of a surprise Japanese military attack on December 7, 1941, which led the United States to enter World War II.

Quick Scoop

What Pearl Harbor Is

  • Pearl Harbor is a natural harbor and major naval base on the island of Oahu, Hawaii, home to the U.S. Pacific Fleet.
  • Today it is also a national memorial site dedicated to those killed in the 1941 attack and the wider Pacific War.

What Happened on December 7, 1941

  • On the morning of December 7, 1941, Imperial Japan launched a surprise aerial attack on the U.S. forces at Pearl Harbor.
  • The assault sank or damaged most U.S. battleships present, destroyed over 150 aircraft, and killed more than 2,300 American service members, wounding nearly 1,200 others.

Why It Mattered

  • The attack “precipitated the entry of the United States into World War II” as Congress declared war on Japan the next day.
  • It ended U.S. isolationism, drew America fully into the global conflict, and became a turning point that reshaped worldwide power and alliances.

Pearl Harbor Today & Memory

  • The Pearl Harbor National Memorial, including the USS Arizona Memorial, serves as a place to honor the dead, understand the Pacific War, and promote reflection and reconciliation.
  • In American memory, “Remember Pearl Harbor” symbolizes sudden attack, sacrifice, and the resolve to defend freedom and democracy.

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