When was the first world war started and ended
- When did the first world war started and ended
- When was the first world war ended
- When did the first and second world war started and ended
- When was the first and second world war started and ended
- When does the first world war started and ended
- The first world war started and ended in what year
- First world war started and ended date
- When was first world war began and ended
- Who started world war ii