The Communist Party of the Soviet Union has entrusted the same strategy of deception and convergence to Putin as to Yeltsin, Gorbachev, Andropov and those Soviet leaders before them.
NATO has broken promises to Mihkail Gorbachev not to expand beyond the eastern border of the former West Germany. There sure was talk of it — Gorbachev was directly promised it, although it was never documented anywhere. And where is NATO now? Where is its border? We were fooled, that was it.
— Russian President Vladimir Putin, Valdai Forum, September 19, 2013
source 1 source 2 source 3