How did Crimea become part of Russia?

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Tags

1. #great
2. #russian
3. #ukraine
4. #transferred
5. #khrushchev
6. #empire
7. #catherine
8. #annexed
9. #under
10. #russia
11. #leader
12. #until
13. #remained
14. #during
15. #reign
16. #crimea
17. #nikita
18. #soviet