START I

START

Strategic Arms Reduction Treaty Договор о сокращении стратегических наступательных вооружений
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, 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 I (Strategic Arms Reduction Treaty) was a bilateral treaty between the United States and the Soviet Union on the reduction and the limitation of strategic offensive arms. The treaty was signed on 31 July 1991 and entered into force on 5 December 1994.^[1] The treaty barred its signatories from deploying more than 6,000 nuclear warheads and a total of 1,600 intercontinental 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% of all strategic nuclear weapons then in existence. Proposed by US President Ronald Reagan, it was renamed START I after negotiations began on START II.

The treaty expired on 5 December 2009.

On 8 April 2010, the replacement New START Treaty was signed in Prague by US President Barack Obama and Russian President Dmitry Medvedev. Following its ratification by the US Senate and the Federal Assembly of Russia, the treaty went into force on 5 February 2011, extending deep reductions of American and Soviet or Russian strategic nuclear weapons through February 2026.^[2][3]