Iron Curtain: A term used to describe the ideological divide between communist Eastern Europe (including East Berlin) and democratic Western Europe during the Cold War.
Blocs: Refers to groups of countries with similar political or economic interests that align with one another in international relations. For example, NATO represented Western bloc countries, while Warsaw Pact represented Eastern bloc countries during the Cold War.
Demarcation Line: A clearly defined boundary or line that separates two regions or territories, often used to mark divisions between conflicting factions.