What term did Winston Churchill use to describe the division between the Eastern and Western blocs during the Cold War?

Winston Churchill described the division between the Eastern and Western blocs during the Cold War as the "Iron Curtain." This term symbolized the ideological and physical boundary that separated the communist countries of Eastern Europe, under Soviet influence, from the democratic nations of Western Europe. Churchill emphasized the stark contrast in political ideologies and the growing tension between the two sides after World War II. The "Iron Curtain" came to represent the lack of communication and contact between the East and West, highlighting the divisions caused by the Cold War rivalry.

The other terms do not accurately reflect the historical context or the specific language used by Churchill. For instance, the "Barrier of Silence" and "Cold Shield" do not have recognized significance in relation to the Cold War, and "Division Line" is too vague and lacks the specific connotations that "Iron Curtain" carries. The impact of the term "Iron Curtain" has endured, making it a powerful metaphor for the era's geopolitical landscape.