Why did the US-Soviet alliance begin to break down in 1945?

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Across
  1. 6. New US President taking tougher stance
  2. 7. Country divided among the Allies
  3. 10. Shift towards resisting Soviet influence
  4. 11. Summit marked by growing tensions
  5. 12. US refusal to share nuclear information
  6. 13. Disputes about political freedoms
  7. 14. Cooperation replaced by rivalry
  8. 15. USSR wanted friendly governments in Eastern Europe
  9. 16. Meeting where Allies agreed on post‑war plans
  10. 17. Soviet distrust of Western motives
  11. 18. US warning that USSR sought expansion
  12. 20. Both sides sought influence after WWII
  13. 21. Arguments over how much Germany should pay
Down
  1. 1. Churchill’s claim Europe was divided
  2. 2. Communism and capitalism in conflict
  3. 3. City split into four zones
  4. 4. Arguments about free elections
  5. 5. Churchill–Stalin deal on influence zones
  6. 8. Rivalry replacing wartime unity
  7. 9. US saw this as aggressive expansion
  8. 19. Growing suspicion between wartime allies