Great War Crossword

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Across
  1. 7. The original names given to tanks developed during World War I.
  2. 8. Ideas spread to influence public opinion for/against a subject.
  3. 9. Troops from British colonies who fought in the Gallipoli campaign.
  4. 10. The US joined the war after Germany sent the ___ telegram to Mexico.
Down
  1. 1. Italy, France, Great Britain, and Russia. (2 words)
  2. 2. Fighting in ditches protected by barbed wire. (2 words)
  3. 3. British ship that was sunk by German forces in 1915
  4. 4. A War involving the complete mobilization of resources and people. (2 words)
  5. 5. A new kind of weapon that required soldiers to be given masks, it was outlawed after the war. (2 words)
  6. 6. German submarines that were attacking military and civilian ships alike.