The first world war was started in which year
- The first world war was in which year
- The first world war was ended in which year
- The first world war began in which year
- The first world war years
- The first world war started and ended in which year
- The first world war was held in which year
- The first world war was broke out in which year
- The first world war was between which year
- The first world war began in the year
- The first world war happened in which year
- The first world war was fought between which year
- The first world war took place in which year