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
History of the Communist Party of the Soviet Union and rather than being a locus for change became a bulwark of conservatism. Increasingly, Gorbachev bypassed the party in order to implement his reforms relying instead on governmental bodies. In 1989 Gorbachev allowed other political associations (de facto political parties) to coexist with the Communist Party and in 1990 obtained the repeal of Article Six of the USSR constitution which gave the party supremacy over all institutions in society, thus ending its vanguard status. The Communist Party's power over the state formally ended that same year with the newly created post of President of the Soviet Union. Gorbachev was elected