Across
- 6. Armored vehicles first used extensively in World War I
- 8. International organization created to promote peace
- 9. Severe worldwide economic downturn beginning in 1929
- 11. Agreement to stop fighting
- 13. Political system associated with Mussolini's Italy
- 14. Policy of gaining colonies and foreign territories
- 15. German strategy for fighting a two-front war
- 18. Information used to influence public opinion during war
- 19. Long World War I battle fought mainly by British forces
- 20. Major World War I battle with massive casualties
Down
- 1. Underwater vessels used to attack ships
- 2. Treaty that officially ended the war with Germany
- 3. Strong pride in one's nation that can lead to rivalry
- 4. Fighting from long defensive ditches
- 5. Agreements between nations for mutual support
- 7. Radical Russian group led by Lenin
- 10. Chinese Nationalist Party led by Chiang Kai-shek
- 12. Building large armed forces and glorifying military power
- 16. Planned destruction of an entire people group
- 17. Political party led by Hitler in Germany