Cold War to the Kremlin's military and political concessions, Reagan agreed to renew talks on economic issues and the scaling-back of the arms race. The first summit was held in November 1985 in Geneva, Switzerland. At one stage the two men, accompanied only by an interpreter, agreed in principle to reduce each country's nuclear arsenal by 50 percent. A second summit, was held in October 1986, Reykjavík, Iceland. Talks went well until the focus shifted to Reagan's proposed Strategic Defense Initiative, which Gorbachev wanted eliminated. Reagan refused. The negotiations failed, but the third summit in 1987 led to a breakthrough with the
Treaty on Conventional Armed Forces in Europe the establishment of an effective verification system. Meanwhile, in December the INF Treaty between the United States and the Soviet Union was signed, effectively allowing mutual inspections. During the May–June 1988 Moscow Summit, US President Ronald Reagan and General Secretary Gorbachev emphasized the importance of stability and security in Europe, specifically calling for data exchange, verification of these data, and then reductions. In December Gorbachev announced at the United Nations a unilateral withdrawal of 50,000 troops from Eastern Europe, and demobilization of 500,000 Soviet troops. In January 1989, NATO and the Warsaw Treaty members produced the Mandate for the Negotiation