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Events on Wednesday 31 July 1991 1
1991United States and Soviet Union Sign START ILandmark treaty cuts strategic nuclear arsenalsPresident George H.W. Bush and Soviet leader Mikhail Gorbachev signed the Strategic Arms Reduction Treaty in Moscow, committing both nations to cut their long-range nuclear arsenals by about a third. It was the first treaty to require actual reductions in strategic nuclear weapons rather than just limiting growth. The treaty took effect after the Soviet collapse, binding its successor states.