WWI Crossword Puzzle

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Across
  1. 4. Nations pride
  2. 5. One of the first countries to surrender
  3. 10. First full-scale offensive with tanks
  4. 12. When all resources are devoted to war
  5. 15. Russian leaving war
  6. 18. Type of warfare with networks
  7. 20. Warfare to sink any ship
  8. 21. Dropping bombs on important places
  9. 22. Continent where fighting was in Egypt
  10. 25. Who went to war
  11. 26. Where fighting of Germans and Russians happened
  12. 28. First aircraft used
  13. 29. Words for deaths
  14. 33. Treaty from Russia to Germany
  15. 36. Where Germans sent Zimmermann note
  16. 38. Note from Germans to Mexico
  17. 39. Goods needed for war
  18. 40. Battle to stop advances of Germans
Down
  1. 1. Big vehicles combating trench warfare
  2. 2. Another word for planes
  3. 3. He stepped down because of revolt in Germany
  4. 6. German submarine
  5. 7. First war that included use of planes
  6. 8. Only country/continent involved
  7. 9. Improved weapon used by soldiers
  8. 11. First US Marines in WWI combat
  9. 13. Where most of the fighting happened
  10. 14. Popular way to recruit
  11. 16. Plan to win
  12. 17. Land between opposing sides
  13. 19. A chemical warfare
  14. 23. To strongly go against
  15. 24. "Big Push" battle
  16. 27. Fire weapon, used in trenches
  17. 30. Longest battle in WWI
  18. 31. Person who offered truce to Germany
  19. 32. US continent
  20. 34. French plan to retake
  21. 35. Who replaced men in factories
  22. 37. Battle for Germans to attack and frighten French