What was the spark that set of world war 1
- What was the spark that ignited world war 1
- What event was the spark that started world war 1
- What was the spark that set off world war 1
- What was the spark of world war 1
- What was the spark that set the world into war in 1914
- What was the spark that started world war 1
- What was the spark that caused world war 1
- What was the spark that began world war 1
- What was the spark that started world war 1 in europe
- What was the spark that triggered world war 1
- What was the spark that caused world war 1 to begin
- What was the spark that ignited the start of world war 1
- What was the spark that led to world war 1
- What was the spark or start of world war 1
- What was the immediate spark of world war 1