History of socialism under challenge from Solidarność, or Solidarity, a labor union under the leadership of Lech Wałęsa. The union was sufficiently threatening to the government that on 13 December 1981, the head of state, Wojciech Jaruzelski declared martial law, suspended the union, and imprisoned most of its leaders. Mikhail Gorbachev (born 1931), who took control in 1985, was the first Soviet leader to have been born after the October revolution. He is remembered for three initiatives: "glasnost", "perestroika", and the "Frank Sinatra doctrine". "Glasnost", or "openness", was Gorbachev's term for allowing public debate in the Soviet Union to an unprecedented degree. "Perestroika"
Cold War (1985–1991) since the end of World War II. This bloc, known as the ‘Reagan Victory School’ constitutes a different historiographical perspective to the end of the Cold War. Space exploration has petered out in both the United States and Russia without the competitive pressure of the space race. Military decorations have become more common, as they were created, and bestowed, by the major powers during the near 50 years of undeclared hostilities. Cold War (1985–1991) The Cold War period of 1985–1991 began with the rise of Mikhail Gorbachev as leader of the Soviet Union. Gorbachev was a revolutionary leader for the