What were all the countries in world war 1
- What were the countries in world war 1
- What were the countries involved in world war 1
- What were the main countries in world war 1
- What were the countries fighting in world war 1
- Allied countries world war 1
- What were the neutral countries in world war 1
- What were the countries that fought in world war 1
- What were all the countries involved in world war 1
- What were the initial countries in world war 1
- What were the first countries in world war 1
- What were the two main countries in world war 1
- What were the triple entente countries in world war 1
- What were the main countries involved in world war 1
- What are all the countries that fought in world war 1
- What were the initial countries involved in world war 1