World War I

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Across
  1. 2. A truce or an agreement to end fighting.
  2. 3. Torpedoed by German U-boat
  3. 5. Great Britain, France, Russia
  4. 7. battle machines developed for war
  5. 9. a military explosive projectile filled with noxious gas
  6. 10. German general, politician and military theorist.
Down
  1. 1. Treaties that brought World War I to an end.
  2. 4. A bomb that produces a lot of smoke when it explodes.
  3. 6. Disease that spread not long after World War I.
  4. 8. wire with clusters of short, sharp spikes set at intervals along it, used to make fences or in warfare as an obstruction.