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 erode Gromyko's dominance of Soviet foreign policy while at the same time sending a signal to the U.S. government that he wanted to improve Soviet-U.S. relations. On 11 March 1985, Chernenko died. Gromyko proposed Gorbachev as the next General-Secretary; as a longstanding party member, Gromyko's recommendation carried great weight among the Central Committee. Gorbachev expected much opposition to his nomination as Chernenko's successor, but ultimately the rest of the Politburo supported him. Shortly after Chernenko's death, the Politburo unanimously elected Gorbachev as his successor; they wanted him over another elderly leader. Although not a well-known figure to the Soviet public,