2Nd World War Dates

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The Second World War was a global conflict that reshaped the world, lasting from September 1, 1939, to September 2, 1945. This six-year period witnessed unprecedented destruction, transforming the geopolitical landscape and claiming millions of lives across multiple continents.

Origins and Initial Conflict

While historians debate the exact starting point, September 1, 1939, is widely recognized as the official beginning of World War II. On this date, Nazi Germany invaded Poland, prompting Great Britain and France to declare war on Germany just two days later on September 3rd.

However, some historians argue that the roots of the conflict extend further back. Notable pre-war events include:

  • 1931: Japan's invasion of Manchuria
  • 1935: Italy's invasion of Ethiopia
  • 1937: The Marco Polo Bridge Incident between Japan and China

Major Theaters of War

The conflict spanned multiple geographical regions, including:

  • Europe
  • Pacific
  • Atlantic
  • South-East Asia
  • China
  • Middle East
  • Mediterranean
  • Northern Africa

Key Turning Points

Several critical moments defined the war's progression:

  • December 7, 1941: Japan attacks Pearl Harbor, drawing the United States into the conflict
  • June 22, 1941: Germany launches Operation Barbarossa, invading the Soviet Union
  • June 4-7, 1942: Battle of Midway, which thwarted Japanese expansion in the Pacific
  • February 1943: Soviet victory at Stalingrad, marking a turning point in the European theater

Conclusion of the War

The war officially concluded on September 2, 1945, with Japan's formal surrender. This came after the United States dropped atomic bombs on Hiroshima and Nagasaki. Prior to this, Germany had unconditionally surrendered on May 7, 1945, seven days after Adolf Hitler's suicide.

Human Cost

The war was devastatingly deadly, with estimated total casualties ranging between 35 million to 60 million people. Countries with the highest losses included:

  • Soviet Union: 42 million
  • Germany: 9 million
  • China: 4 million
  • Japan: 3 million

On average, 27,000 people were killed each day during this six-year period, making it the bloodiest conflict in human history.

When exactly did World War II start?

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Most historians agree that World War II officially began on September 1, 1939, when Nazi Germany invaded Poland.

When did World War II end?

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World War II ended on September 2, 1945, with Japan’s formal surrender, following the atomic bombings of Hiroshima and Nagasaki.

How long did World War II last?

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The war lasted approximately 6 years and 1 day, from September 1, 1939, to September 2, 1945.