[custom_adv] The Berlin Wall was a guarded concrete barrier that physically and ideologically divided Berlin from 1961 to 1989. Construction of the Wall was commenced by the German Democratic Republic (GDR, East Germany) on 13 August 1961. The Wall cut off West Berlin from surrounding East Germany, including East Berlin. [custom_adv] The barrier included guard towers placed along large concrete walls, accompanied by a wide area (later known as the "death strip") that contained anti-vehicle trenches, "fakir beds" and other defenses. The Eastern Bloc portrayed the Wall as protecting its population from fascist elements conspiring to prevent the "will of the people" in building a socialist state in East Germany. [custom_adv] GDR authorities officially referred to the Berlin Wall as the Anti-Fascist Protection Rampart (German: Antifaschistischer Schutzwall). The West Berlin city government sometimes referred to it as the "Wall of Shame", a term coined by mayor Willy Brandt in reference to the Wall's restriction on freedom of movement. [custom_adv] Along with the separate and much longer Inner German border (IGB), which demarcated the border between East and West Germany, it came to symbolize physically the "Iron Curtain" that separated Western Europe and the Eastern Bloc during the Cold War. [custom_adv] Before the Wall's erection, 3.5 million East Germans circumvented Eastern Bloc emigration restrictions and defected from the GDR, many by crossing over the border from East Berlin into West Berlin; from there they could then travel to West Germany and to other Western European countries. [custom_adv] Between 1961 and 1989 the Wall prevented almost all such emigration. During this period over 100,000 people attempted to escape and over 5,000 people succeeded in escaping over the Wall, with an estimated death toll ranging from 136 to more than 200 in and around Berlin. [custom_adv] In 1989, a series of revolutions in nearby Eastern Bloc countries—in Poland and Hungary in particular—caused a chain reaction in East Germany that ultimately resulted in the demise of the Wall.After several weeks of civil unrest, the East German government announced on 9 November 1989 that all GDR citizens could visit West Germany and West Berlin. [custom_adv] Crowds of East Germans crossed and climbed onto the Wall, joined by West Germans on the other side in a celebratory atmosphere. Over the next few weeks, euphoric people and souvenir hunters chipped away parts of the Wall. The Brandenburg Gate in the Berlin Wall was opened on 22 December 1989. [custom_adv] The demolition of the Wall officially began on 13 June 1990 and was completed in November 1991. The "fall of the Berlin Wall" paved the way for German reunification, which formally took place on 3 October 1990. [custom_adv] After the end of World War II in Europe, what remained of pre-war Germany west of the Oder-Neisse line was divided into four occupation zones (as per the Potsdam Agreement), each one controlled by one of the four occupying Allied powers: the United States, the United Kingdom, France and the Soviet Union. [custom_adv] The capital of Berlin, as the seat of the Allied Control Council, was similarly subdivided into four sectors despite the city's location, which was fully within the Soviet zone. [custom_adv] Within two years, political divisions increased between the Soviets and the other occupying powers. These included the Soviets' refusal to agree to reconstruction plans making post-war Germany self-sufficient, and to a detailed accounting of industrial plants, goods and infrastructure—some of which had already been removed by the Soviets. [custom_adv] France, the United Kingdom, the United States, and the Benelux countries later met to combine the non-Soviet zones of Germany into one zone for reconstruction, and to approve the extension of the Marshall Plan. [custom_adv] Following the defeat of Nazi Germany in World War II, the Soviet Union engineered the installation of friendly Communist governments in most of the countries occupied by Soviet military forces at the end of the War, including Poland, Hungary, Czechoslovakia, Bulgaria, Romania, and the GDR, which together with Albania formed the Comecon in 1949 , and later a military alliance, the Warsaw Pact . [custom_adv] This bloc of nations was set up by the Soviets in opposition to NATO in the capitalist West in what became the Cold War .Since the end of the War, the Soviets together with like-minded East Germans created a new Soviet-style regime in the Soviet Zone and later the GDR, on a centrally planned socialist economic model with nationalized means of production, and with repressive police state institutions, under party dictatorship of the SED similar to the party dictatorship of the Soviet Communist Party in the USSR. [custom_adv] At the same time, a parallel regime was established under the strict control of the Western powers in the zones of post-war Germany occupied by them, culminating in foundation of the Federal Republic of Germany in 1949 (Turner, Henry Ashby.