Causes of World War 1

1. was a secret diplomatic communication issued from the German Foreign Office on January 17, 1917
5. A mechanized weapon first used in World War 1
8. Strong pride in one's own country
10. clandestine, covert, and deniable military and intelligence operations
11. Countries teaming up to help each other
12. a policy of remaining apart from the affairs or interests of other groups, especially the political affairs of other countries.

2. The idea and policy of constantly building a strong army and navy
3. the policy of a powerful nation extending its rule and influence over other territories
4. British ocean liner sunk by a German U-boat in 1915 during World War I, killing 1,198 people, including 128 Americans, near Ireland
6. War that was largely fought in Europe from 1914 to 1918
7. the 28th president of the United States from 1913 to 1921
9. The major fighting style of World War 1 __________ warfare