Which country was divided into East and West during the Cold War?

The country that was divided into East and West during the Cold War is Germany. Following World War II, Germany was split into two separate states as a result of geopolitical tensions between the Soviet Union and the Western Allies. This division was formalized in 1949, leading to the establishment of East Germany (officially the German Democratic Republic) under Soviet influence, and West Germany (the Federal Republic of Germany), which was aligned with the United States and its allies.

This division became a significant symbol of the Cold War, epitomized by the Berlin Wall, which was erected in 1961 to prevent East Germans from fleeing to the West. The wall became a powerful representation of the ideological divide between communism and capitalism. It remained until 1989 when the wall fell, leading to the eventual reunification of Germany in 1990.

While other countries listed, such as Korea and Vietnam, also experienced divisions during or after the Cold War, the context of the question specifically points to Germany as the most prominantly recognized example of East-West division during this period.