When the world war happened
- When the first world war happened
- When the second world war happened
- When the world war 2 happened
- When the world war 1 happened
- When did the world war happened
- When the world war ii happened
- When the 2nd world war happened
- When 1st world war happened
- When did the world war 2 happened
- Where did world war 1 happened
- When the third world war happened
- When the world war 3 happened
- When did the first world war happened
- When did the second world war happened
- When was the last world war happened