Can you Crack the Code?

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Across
  1. 1. This global conflict began in 1914 (6, 3)
  2. 4. Chamberlain's policy (11)
  3. 9. Anti-colonial movement in India, symbolic with salt (4, 5)
  4. 11. Event marking the start of the Great Depression in 1929 (5, 7)
  5. 13. Country that underwent a "Cultural Revolution"
  6. 14. This type of warfare was first used extensively during World War 1 (7)
  7. 17. Canadians and Chinese fought side by side(4,4)
  8. 19. World economy directly after WW1(9)
  9. 20. Document that established peace after WWI (7,2,6)
  10. 21. Dictator of Italy during WWII (6)
  11. 23. Germanys military strategy in WW2(10)
  12. 24. Ideology associated with Mao and the Chinese revolution (7)
  13. 26. Ideological leader of the U.S.S.R.(5)
  14. 27. The land of the Rising Sun(5)
  15. 30. Britain Declares War(6)
  16. 32. Alliance primarily between USA and Western European countries during the Cold War (4, 7)
  17. 33. Germany after WW1(6,8)
  18. 34. Movement that sought to improve the lives of African-Americans, initiated in the 1950s and 1960s (5, 6)
  19. 35. 1961 crisis over missile deployment in Cuba (6, 5)
Down
  1. 2. Peasant Uprising in European Country (7,10)
  2. 3. Burrow money to buy stocks (6,2,6)
  3. 4. Pact signed by Germany, Italy, and Japan in 1940 (4, 4)
  4. 5. Leader of the Indian independence movement, last name (6)
  5. 6. International trial post-WWII for war crimes (8, 5)
  6. 7. Mass genocide carried out by the Nazis (9)
  7. 8. Used to intimidate people in Italy (5,6)
  8. 10. President of the United States during the Great Depression and most of WWII (9)
  9. 12. British luxury liner sunk by a German submarine in 1915 (8)
  10. 15. Leader of the U.K. during WW2 (9)
  11. 16. He developed the theory of relativity (7)
  12. 18. American financial support to European countries(4,5,3)
  13. 22. Leader of the U.S.S.R. during WW2 (6)
  14. 25. Organization designed to prevent future wars(6,2,7)
  15. 28. Economic recovery plan for Europe after WWII (6, 4)
  16. 29. Used by U.S.A. in 1945(6,4)
  17. 31. Invented the first Nuclear Bomb (11)