The Berlin Wall was built by the Soviet Union to keep the communist controlled East  separate from the Democratic West. The city was divided between four countries, the Soviet Union. the United States, Britain, and France. The Wall was built to keep peace between the communists and the democratic nations. The Soviet Union built the wall to keep their people from leaving. Life with the wall was normal except for the heavily defended wall with armed guards dividing the city. This lead to high tension between the two sides. The wall fell because the tensions were growing, and the Soviet Unions power was falling. JFK used it to gain more allies in the war on communism. The wall was taken down because the Soviet Union was disbanded.