Answer:
The Berlin Wall was a barrier that divided the city of Berlin, Germany, into two parts: West Berlin, which was controlled by the Western powers (United States, United Kingdom, and France), and East Berlin, which was controlled by the Soviet Union. It was constructed by the East German government in 1961 to prevent East Germans from fleeing to the West. The Berlin Wall became a symbol of the Cold War and the divide between communism and democracy. It fell in 1989, marking the end of the Cold War and the reunification of Germany. The Berlin Wall had a significant impact on the course of history, as it represented the tension and conflict between the Soviet Union and the Western powers during the Cold War. Its fall in 1989 was a major turning point in international relations and the history of Europe.