This is a revival of a system created in 1949 when Western countries essentially lowered an 'Iron Curtain', cutting off supplies of hi-tech goods to the USSR and other countries.
Winston Churchill's "Sinews of Peace" speech, 1946:
From Stettin in the Baltic to Trieste in the Adriatic, an iron curtain has descended across the Continent. Behind that line lie all the capitals of the ancient states of Central and Eastern Europe. Warsaw, Berlin, Prague, Vienna, Budapest, Belgrade, Bucharest and Sofia, all these famous cities and the populations around them lie in what I must call the Soviet sphere, and all are subject in one form or another, not only to Soviet influence but to a very high and, in many cases, increasing measure of control from Moscow. Athens alone - Greece with its immortal glories - is free to decide its future at an election under British, American and French observation. The Russian-dominated Polish Government has been encouraged to make enormous and wrongful inroads upon Germany, and mass expulsions of millions of Germans on a scale grievous and undreamed-of are now taking place. The Communist parties, which were very small in all these Eastern States of Europe, have been raised to pre-eminence and power far beyond their numbers and are seeking everywhere to obtain totalitarian control. Police governments are prevailing in nearly every case, and so far, except in Czechoslovakia, there is no true democracy.
I wonder, exactly which nation was behind the "Iron Curtain". You may have some difficulty deciding this, so was it the "USA", as alleged by our rabid Putinist above, or, just possibly, the USSR? Emphasis added to the second quote for the congenitally hard of understanding.