Related Clues:

• Cold war threat
• See 1-Across
• See 23-Across
• Abbr. on old maps
• See 4-Down
• Abbr. on old Asian maps
• Pre-1991 atlas abbr.
• Former G.D.R. ally
• Red letters?
• Stalin's domain
• One of the Allies of W.W. II
• Big bang maker
• It broke up in Dec. 1991
• Cold war foe
• Cold war abbr.