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how long was world war 2

World War II lasted about six years, from 1939 to 1945.

Quick Scoop

  • Most historians date World War II from September 1, 1939 (Germany’s invasion of Poland) to September 2, 1945 (Japan’s formal surrender), which is roughly six years and one day.
  • Some descriptions round this to “six years” for simplicity, while others say “six years and seven months,” depending on whether they emphasize Germany’s May 1945 surrender or Japan’s September 1945 surrender as the end point.
  • In everyday terms, if you’re asking “how long was World War 2,” the widely accepted answer is that it lasted six years.🕊️

“The war lasted six years, from 1939 until 1945.”

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