How did the first world war start?

Related questions

1. How many wars has the US been involved in?
2. Why did Italy enter ww1?
3. Why did Woodrow Wilson not want to go to war?
4. Why did Germany enter ww1?
5. What was the first war in ww1?
6. Who lost in World War 1?
7. Why did Germany lose ww1 essay?
8. Why did Woodrow Wilson declare war?
9. How did World War 1 end?
10. Who won World War 1?

Tags

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2. #declarations
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4. #directly
5. #world
6. #triggered
7. #gavrilo
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11. #archduke
12. #revolutionary
13. #august
14. #assassination
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16. #princip
17. #bosnian
18. #trigger
19. #ferdinand
20. #began
21. #austrian