START I
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START (for Strategic Arms Reduction Treaty) is a 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 by the United States and the USSR, that barred its signatories from deploying more than 6,000 nuclear warheads atop a total of 1,600 ICBMs, submarine-launched ballistic missiles, and bombers.
Proposed by United States' President Ronald Reagan, it was renamed START I after negotiations began on the second START treaty, which became START II. It was signed on July 31, 1991, five months before the collapse of the Soviet Union.
Entry-into-force was delayed due to the collapse of the USSR and awaiting an Annex that enforced the terms of the treaty upon the newly independent states of Russia, Belarus, Kazakhstan, and Ukraine. The latter three agreed to transport their nuclear arms to Russia for disposal.
It remains in effect between the U.S. and Russia, Belarus, Kazakhstan, and Ukraine — the latter three of which have since gotten rid of their nuclear weapons.
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