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Related Clues:
- Former federation
- Cold War unit: Abbr.
- One-time superpower
- U.S. ally in W.W. II
- Moscow was its cap.
- Khrushchev's country: Abbr.
- Letters on pre-1991 maps
- Evil Empire acronym
- RWR's 'evil empire'
- Former Security Council member
- Five-Year Plan implementer, for short
- WWII U.S. ally
- State dissolved in 1991
- Once-mighty initials
- Cold War-era abbr.