What were the main countries in world war 1
- What were the countries in world war 1
- Allied countries world war 1
- What were the neutral countries in world war 1
- What were the countries involved in world war 1
- What were the countries fighting in world war 1
- What were all the countries in world war 1
- What were the countries that fought in world war 1
- What countries were the allies in world war 1
- What countries were in world war 1 and 2
- What were the neutral countries during world war 1
- What were the two main countries in world war 1
- What were the main countries involved in world war 1
- What were the main countries fighting in world war 1
- What were the 2 main countries fighting in world war 1
- What were the initial countries in world war 1