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START Treaty

START
Strategic Arms Reduction Treaty
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Presidents George H. W. Bush and Mikhail Gorbachev sign START, 31 July 1991
Type Strategic nuclear disarmament
Drafted 29 June 1982 – June 1991
Signed 31 July 1991
Location Moscow, Russian SFSR, Soviet Union
Effective 5 December 1994
Condition Ratification of both parties
Expiration 5 December 2009
Signatories George H. W. Bush
Mikhail Gorbachev
Parties United States
Soviet Union
Languages Russian, English

START (Strategic Arms Reduction Treaty) was a bilateral treaty between the United States of America and the Union of Soviet Socialist Republics (USSR) on the reduction and limitation of strategic offensive arms. The treaty was signed on 31 July 1991 and entered into force on 5 December 1994. The treaty barred its signatories from deploying more than 6,000 nuclear warheads atop a total of 1,600 inter-continental ballistic missiles (ICBMs) and bombers. START negotiated the largest and most complex arms control treaty in history, and its final implementation in late 2001 resulted in the removal of about 80 percent of all strategic nuclear weapons then in existence. Proposed by United States President Ronald Reagan, it was renamed START I after negotiations began on the second START treaty.

The START I treaty expired 5 December 2009. On 8 April 2010, the replacement New START treaty was signed in Prague by U.S. President Barack Obama and Russian President Dmitry Medvedev. Following ratification by the U.S. Senate and the Federal Assembly of Russia, it went into force on 26 January 2011.

The START proposal was first announced by United States President Ronald Reagan in a commencement address at his alma mater, Eureka College on 9 May 1982, and presented by President Reagan in Geneva on 29 June 1982. Reagan proposed a dramatic reduction in strategic forces in two phases, which he referred to as SALT III at the time. The first phase would reduce overall warhead counts on any missile type to 5,000, with an additional limit of 2,500 on ICBMs. Additionally, a total of 850 ICBMs would be allowed, with a limit of 110 "heavy throw" missiles like the SS-18, with additional limits on the total "throw weight" of the missiles as well. The second phase introduced similar limits on heavy bombers and their warheads, and other strategic systems as well.


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