World war 1 two countries
- World war 1 between which two countries
- World war 1 happened between which two countries
- World war 1 started between which two countries
- World war 1 was fought between which two countries
- World war 1 was held between which two countries
- World war 1 started as a conflict between which two countries
- World war 1 started as a dispute between which two countries
- Which two countries started world war 1
- World war 1 was fought between two major alliances of countries
- Two main countries in world war 1
- During world war 1 countries split into two teams or
- Which two countries fought world war 1
- Which two countries joined world war 1 in 1915