"Declassified documents show security assurances against NATO expansion to Soviet leaders from Baker, Bush, Genscher, Kohl, Gates, Mitterrand, Thatcher, Hurd, Major, and Woerner"

NATO Expansion: What Gorbachev Heard | National Security Archive

Western leaders gave multiple assurances against NATO expansion to Gorbachev in 1990-1991 according to declassified American, Russian, British, Ger...