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Berlin Wall,1961–89, a barrier first erected in Aug., 1961, by the East German government along the border between East and West Berlin, and later along the entire border between East Germany and West Germany. At first constructed of barbed wire, the wall was built to halt large numbers of defections and to prevent East Berliners from commuting to the West. Erected at a time of growing tension between East and West, the barrier was eventually replaced by a concrete structure topped with wire and studded with watchtowers manned by East German soldiers. In 1989, after hundreds of thousands of East Germans had fled westward via Hungary and Czechoslovakia, the beleaguered East German regime lifted travel restrictions on Nov. 9, and days later the dismantling of the wall began. Built to keep people in, the wall was dismantled in a failed gamble by the Communists to keep power. By Jan., 1990, the regime was auctioning off large slabs of the wall for hard currency, and had set December for its total demolition. In Oct., 1990, however, East Germany was formally absorbed into the Federal Republic of Germany and only short sections of the wall remained standing, as memorials.
See F. Taylor, The Berlin Wall: A World Divided, 1961–1989 (2007); W. R. Smyser, Kennedy and the Berlin Wall (2009).