When did the world war began
- When did the first world war began
- When did the second world war began
- When did the world war 2 began
- When did the world war 1 began
- When the world war began
- When did world war 1 began in europe
- When did world war ii began in europe
- When did the second world war began in europe
- When did the 2nd world war began
- When did the first world war began in europe
- When did the 1st world war began
- When did the first world war began and end
- When did the third world war began
- When did the second world war began and ended
- When did the world war ii began