an iron curtain
In a speech at Westminster College, Fulton Missouri on March 5th 1946, he said that "from Stettin on the Baltic to Trieste on the Adriatic, an Iron Curtain has descended over Europe".
It sounds like you are referring to the term "iron curtain" which had been used previously but which was picked up by Churchill as a theme in describing the spread of Communism in Europe.
Churchill used the term "iron curtain" in a 12 May 1945 telegram he sent to U.S. President Harry S. Truman regarding his concern about Soviet actions, stating
[a]n iron curtain is drawn down upon their front. We do not know what is going on behind.
Churchill repeated the words in another telegram to President Truman on 4 June 1945, in which he protested against such a U.S. retreat to what was earlier designated as, and ultimately became, the U.S. occupation zone, saying the military withdrawal would bring
Soviet power into the heart of Western Europe and the descent of an iron curtain between us and everything to the eastward.
Winston Churchill was a proud supporter of Capitalsim, and he hated Communism.
Winston Churchill
Winston Churchill described the border between the communist Eastern Europe and the West as an iron curtain.
The dangers of communism in his 'Iron Curtain' speech.
The term Cold War came from Churchill.
iron curtain
winston churchill
Churchill was described as an able student but also as lazy, unpunctual and a troublemaker.
uganda
Winston Leonard Spencer Churchill.
Winston Churchill Winston Churchill Winston Churchill
Winston Churchill was on the West's side of the Cold War. France, Britain, the US, the Free West was on the freedom side of this war. He was against the USSR and Stalin's communism.