What does GRU stand for in Russia?

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Tags

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