Cold War (1985–1991) reduced some strategic arms unilaterally. Fundamental to the dissolution of the Soviet Union, the Gorbachev policy initiatives of Restructuring ("Perestroika") and Openness ("Glasnost") had ripple effects throughout the Soviet world, including eventually making it impossible to reassert central control over Warsaw Pact member states without resorting to military force. On June 12, 1987, Reagan challenged Gorbachev to go further with his reforms and democratization by tearing down the Berlin Wall. In a speech at the Brandenburg Gate next to the wall, Reagan stated: While the aging communist European leaders kept their states in the grip of "normalization", Gorbachev's reformist policies
Mikhail Gorbachev the flag of the Soviet Union was lowered from the Kremlin and was replaced with the Russian tricolor flag. The next day, 26 December, the Soviet of the Republics, the upper chamber of the Supreme Soviet, declared that the Soviet Union had ceased to exist as a functioning state, and formally voted both itself and the Union out of existence. Two days after Gorbachev left office, on 27 December 1991, Yeltsin moved into Gorbachev's old office. Gorbachev had aimed to maintain the CPSU as a united party but move it in the direction of Scandinavian-style social democracy. But when the