ww1 crossword

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Across
  1. 2. partners in war
  2. 6. open top tunnels for soldiers
  3. 8. was a part of ww1
  4. 9. attempt to have world peace
Down
  1. 1. what started tensions to ww1
  2. 2. the killing of a famous person
  3. 3. a partner ship
  4. 4. the unitedstates
  5. 5. germans used this
  6. 7. is where you don't pick a side in a war