Why Churchill used the term from curtain to describe?

Winston Churchill used the term "Iron Curtain" to describe the division between Western democracies and Eastern communist countries after World War II. The phrase symbolized the ideological and physical barrier that separated the Soviet bloc from the West, highlighting the lack of transparency and communication between these opposing sides. Churchill's speech in 1946, where he introduced this concept, marked the beginning of the Cold War era, emphasizing the need for Western nations to unite against the spread of communism.