Across
- 3. toxic chemical mixtures in a gas state
- 5. land that is unoccupied due to fear or uncertainty of the enemy
- 7. consist Serbia, Russia, France, the United Kingdom, Italy, Belgium and the United States.
- 10. a vessel that can be submerged and navigated under water
- 13. consist of Austria-Hungary, Germany, Bulgaria and the Ottoman Empire
- 17. a small, wingless, parasitic insect that lives on the skin of soldiers in World War I
- 18. a long, narrow ditch
- 19. a machine that is able to fly by gaining support from the air
Down
- 1. long-tailed rodents
- 2. things given to people in the trenches
- 4. a large type of armored fighting vehicle with tracks
- 6. a type of artillery with a relatively short barrel
- 8. diarrhea which contains blood
- 9. a small bomb that can be thrown by hand.
- 11. an indirect fire weapon that fires bombs at low velocities, short ranges, and high-arches
- 12. A automatic firearm
- 14. injury of the skin, blood vessels, and nerves of the feet due to prolonged exposure to cold and wet
- 15. To leave the trenches and attack the enemy
- 16. the reaction of some soldiers in World War I to the trauma of battle