GenevaSummit - In November 1985 Gorbachev met Reagan for first time.
Outcome: No formal agreements were struck but a good working relationship was established which would bear fruit in the future
ReykjavikSummit - In October 1986 Gorbachev was concerned about the danger of nuclear weapons, the Chernobyl nuclear disaster highlighted this fact.Gorbachev proposed phasing out nuclear weapons if USA dropped the SDI program.
Outcome: USA was never going to give up the SDI program and no formal agreement was reached but improved international relations
WashingtonSummit - In December 1987 Gorbachev now accepted that SDI was there to stay and the USSRs best interests were served by forming agreements which led to disarmament and reduction in military spending.
Outcome: firstUS-Sovietsummit to lead to a formaltreaty - Intermediate-Range Nuclear Force (INF) Treaty. Both countries would abolish all land-based missiles with a range 500km to 5000km
MoscowSummit - In 1988 some of the more complex aspects of the INF treaty were resolved.
Outcome: Gorbachev travelled to UNlater in year and announced a reduction in Warsaw Pact troops
MaltaSummit - In 1989 Gorbachev met with new US President George Bush.
Outcome: No new formal agreements,however, both sides viewed this as the end of the Cold War.