Iceland in the Cold War a summit in Reykjavík in 1986 between United States President Ronald Reagan and Soviet Premier Mikhail Gorbachev, during which they took significant steps toward nuclear disarmament. Only a few years later, in 1991, when Jón Baldvin Hannibalsson was foreign minister, Iceland would become the first country to recognize the independence of Estonia, Latvia, and Lithuania as they broke away from the Soviet Union. The US base served as a hub for transports and communications to Europe, a key chain in the GIUK gap, a monitor of Soviet submarine activity, a linchpin in the early warning system for incoming Soviet attacks,
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