What was the spark of world war one
- What was the spark that started world war one
- What was the spark that ignited world war one
- What was the spark that caused world war one
- What was the spark that started world war one in 1914
- What is considered the spark of world war one
- What was the spark that triggered world war one
- What was the spark that set off world war one
- What was the spark that led to world war one
- What was the spark that provided the immediate cause of world war one
- What was the particular spark that ignited world war one
- 2 what was the spark that started world war one
- What helped spark world war one