Eastern Bloc: The Eastern Bloc comprised countries in Eastern Europe under the political and military influence of the Soviet Union during the Cold War. These nations adopted communism as their governing ideology.
Collective Security Treaty Organization (CSTO): The CSTO is a military alliance formed by several former Soviet republics after the dissolution of the USSR. It aims to provide collective defense against external threats among member states.
Berlin Wall: The Berlin Wall was a physical barrier that divided East Berlin (controlled by the Soviets) from West Berlin (controlled by Western democracies). It symbolized the division between communist and non-communist influences during the Cold War.