What does GRU stand for?

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Tags

1. #acronym
2. #version
3. #russia
4. #intelligence
5. #russian
6. #service
7. #which
8. #union
9. #federation
10. #soviet
11. #english
12. #military
13. #directorate
14. #agency
15. #foreign
16. #largest
17. #means
18. #formerly