How many countries before world war 1
- How many countries was in world war 1
- How many countries involved world war 1
- How many countries in europe before world war 1
- How many countries were there before world war 1
- How many countries joined world war 1
- How many countries did world war 1 involve
- How many countries participated in world war 1
- How many countries fought in world war 1 and 2
- How many countries included in world war 1
- How many countries participated in world war 1 and 2
- How many european countries existed in 1914 before world war i