When the first world war
- When the first world war ended
- When the first world war started
- When the first world war started and ended
- When the first world war end
- When the first world war start
- When the first world war happened
- When first world war began
- Where first world war held
- When the first world war broke out
- When the first world war took place
- Who fought in the first world war
- When the first world war began
- When the first world war occur
- When the first world war start and end
- The first world war begins