Churchill repeated the words in a further 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 " . At the Potsdam Conference , Churchill complained to Stalin about an " iron fence " coming down upon the British Mission in Bucharest
Potsdam Conference
Potsdam Conference
Iron Curtain