​The Russian imperial stout was first brewed by a British brewery at the end of the 17th century for Tsar Peter the Great, obviously well before the communist revolution as the name implies.  Iron Curtain comes in two versions, regular at 8.1% ABV and special at 12.5% ABV depending on your bravery.
The phrase Iron Curtain was coined by Winston Churchill shortly after the end of the Second World War when describing the entrenchment and political isolationism of communist Russia when he stated that “…an iron curtain has descended across the continent.”

Iron Curtain - Russian Imperial Stout: ABV 8.1% (12.5% Special Brew) IBU: 50