World War I Crossword

7. Constant bombing led to lack of sleep and fatigue led to this
8. What country steps in to protect Serbia when Austria-Hungary declares war
9. Archduke of Austria-Hungary who was assassinated by Gavrilo Princip
10. The United States refused to join the League of ______
11. This system was introduced and reduces the threat of U-Boats
12. A telegram from Germany to Mexico and the reason the U.S. entered the war
15. France and _____ wanted to punish Germany for the war
16. Also known as the Selective Service Act and was passed in 1917
17. Germany had to pay these after the war
20. On May 17, 1915 Germany sank the British passenger ship call the _____

1. These were filthy with lice, rats, and polluted water from dysentery
2. Building up military's to protect colonies over seas
3. Competition for colonies as a source of raw materials
4. This plan was not as harsh as the Treaty of Versailles
5. World War I was a direct result of this
6. Presidents campaign slogan in 1916
13. Extreme pride in one's country
14. Germany being forced to take sole blame for the war is called the ____ _____ Clause
18. This group didn't want Serbia to be apart of the Austria-Hungary Empire
19. The effects of the Treaty of Versailles will lead to the rise of this person