О которых ходят мутные слухи, но которые никто
не слышал.

Которые в декабре 2017 рассекретили США.

Как тогда проверить, что именно заверяли?

Вернуться к американским архивам и прочесть....

цитата:

Washington D.C., December 12, 2017 – U.S. Secretary of State James Baker’s famous “not one inch eastward” assurance about NATO expansion in his meeting with Soviet leader Mikhail Gorbachev on February 9, 1990, was part of a cascade of assurances about Soviet security given by Western leaders to Gorbachev and other Soviet officials throughout the process of German unification in 1990 and on into 1991, according to declassified U.S., Soviet, German, British and French documents posted today by the National Security Archive at George Washington University (http://nsarchive.gwu.edu).

The first concrete assurances by Western leaders on NATO began on

January 31, 1990, when West German Foreign Minister Hans-Dietrich

Genscher opened the bidding with a major public speech at Tutzing, in

Bavaria, on German unification. The U.S. Embassy in Bonn (see Document

1) informed Washington that Genscher made clear “that the changes in

Eastern Europe and the German unification process must not lead to an

‘impairment of Soviet security interests.’ Therefore, NATO should rule

out an ‘expansion of its territory towards the east, i.e. moving it

closer to the Soviet borders.’” The Bonn cable also noted Genscher’s

proposal to leave the East German territory out of NATO military

structures even in a unified Germany in NATO.[3]