WORLD WAR 1

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Across
  1. 3. A German submarine.
  2. 5. Britain was part of the Triple ________
  3. 8. Attacked by Austria-Hungary at the start of WWI.
  4. 9. The Russian Tsar at the start of WWI.
  5. 10. The German Kaiser at the start of WWI.
Down
  1. 1. A deadly gas.
  2. 2. France's ally.
  3. 4. Germany invaded France through this country.
  4. 6. An armored vehicle.
  5. 7. Soldiers hid there for safety.