Across
- 5. A device used in submarines to see above the water
- 8. The process of preparing troops and equipment for war
- 10. A German submarine used to attack enemy ships
- 12. A formal agreement between nations
- 14. A powerful type of battleship introduced in the early 1900s
- 16. The act of preventing goods or supplies from reaching a country
- 21. A long narrow ditch dug into the ground where soldiers lived and fought
- 22. Concealment used to hide soldiers or equipment
- 23. A psychological condition caused by the trauma of battle
- 24. A chemical weapon that caused severe burns and blindness
Down
- 1. A group of ships traveling together for protection
- 2. An underwater explosive weapon fired from submarines
- 3. A large German airship used for bombing raids
- 4. Information spread to influence public opinion
- 6. Large-caliber guns used in warfare
- 7. An armored vehicle introduced during World War I to cross trenches and break enemy lines
- 9. Soldiers who fight on foot
- 11. Continuous artillery fire over a wide area
- 13. The title of the German emperor
- 15. A short-barreled artillery gun used to fire shells at high angles
- 16. A blade attached to the end of a rifle for close combat
- 17. An agreement to stop fighting
- 18. The dangerous open space between opposing trenches
- 19. A nickname for an American soldier in World War I
- 20. The palace where the peace treaty ending the war was signed