Why did the Soviet Union invade Afghanistan?

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Tags

1. #feared
2. #union
3. #proxy
4. #people
5. #midst
6. #history
7. #december
8. #government
9. #party
10. #insurgency
11. #growing
12. #communist
13. #soviet
14. #against
15. #afghanistan
16. #order
17. #invaded
18. #democratic