Following the invasion, the United Kingdom and France, which had pledged mutual assistance with Poland, declared war on Germany on 3 September 1939. The war soon spread to the greater part of the world, becoming one of the most extensive and most destructive armed conflicts in history, and it ended in 1945.
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Frequently asked questions
- What was Outbreak of World War II?
- World War II began in Europe on 1 September 1939 with Nazi Germany's invasion of Poland.
- When did Outbreak of World War II happen?
- 1939 CE
- Where did Outbreak of World War II take place?
- Polonya → Dünya