Daily Curiosityby Erudico

General History · Question

What event marked the start of World War II?

Answer

Invasion of Poland (1939)

The story behind the answer

World War II began when Nazi Germany invaded Poland on September 1, 1939, using blitzkrieg tactics. This act broke earlier agreements and triggered Britain and France to declare war on Germany on September 3, formally starting the conflict in Europe. The Soviet Union invaded Poland from the east on September 17, following the secret protocol of the Molotov–Ribbentrop Pact, sealing Poland’s fate.

The other options happened later: the Battle of Britain (1940) was an air campaign, D-Day (Normandy,

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