The ring of satellite states that surrounded russia and lay in the soviet sphere of influence became known by the phrase "" "" especially after winston churchill used it in a speech in 1946.

Iron Curtain

Explanation:

Sir Winston Leonard Spencer-Churchill was a British politician, army officer, and writer born on November 30, 1874. According to my research on Winston Churchill's 1946 speech, I can say that based on the information provided within the question this was known as the Iron Curtain. This ring of satellite states lasted from the end of World War II in 1945 until the end of the Cold War in 1991.

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