When was world war 2 happened
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- When did world war 2 happened
- When world war 2 has happened
- When was world war 1 and 2 happened
- When does world war 2 happened
- World war 2 happened between which countries
- World war 2 happened in which year
- World war 2 happened between
- World war 2 happened in which century
- World war 2 happened because
- World war 2 happened in which country
- World war 2 happened how many years ago
- World war 2 happened in 1939
- World war 2 happened between whom
- Who was president when world war 2 happened